diff --git a/system/Helpers/Array/ArrayHelper.php b/system/Helpers/Array/ArrayHelper.php
index 1e7d6904796c..f70f6905ca5d 100644
--- a/system/Helpers/Array/ArrayHelper.php
+++ b/system/Helpers/Array/ArrayHelper.php
@@ -33,7 +33,8 @@ final class ArrayHelper
      *
      * @used-by dot_array_search()
      *
-     * @param string $index The index as dot array syntax.
+     * @param string                  $index The index as dot array syntax.
+     * @param array<array-key, mixed> $array
      *
      * @return mixed
      */
@@ -68,6 +69,9 @@ private static function convertToArray(string $index): array
      *
      * @used-by dotSearch()
      *
+     * @param list<string>            $indexes
+     * @param array<array-key, mixed> $array
+     *
      * @return mixed
      */
     private static function arraySearchDot(array $indexes, array $array)
@@ -125,6 +129,8 @@ private static function arraySearchDot(array $indexes, array $array)
      * array_key_exists() with dot array syntax.
      *
      * If wildcard `*` is used, all items for the key after it must have the key.
+     *
+     * @param array<array-key, mixed> $array
      */
     public static function dotKeyExists(string $index, array $array): bool
     {
@@ -179,11 +185,11 @@ public static function dotKeyExists(string $index, array $array): bool
      *
      * @used-by array_group_by()
      *
-     * @param array $array        Data array (i.e. from query result)
-     * @param array $indexes      Indexes to group by. Dot syntax used. Returns $array if empty
-     * @param bool  $includeEmpty If true, null and '' are also added as valid keys to group
+     * @param array<array-key, mixed> $array        Data array (i.e. from query result)
+     * @param list<string>            $indexes      Indexes to group by. Dot syntax used. Returns $array if empty
+     * @param bool                    $includeEmpty If true, null and '' are also added as valid keys to group
      *
-     * @return array Result array where rows are grouped together by indexes values.
+     * @return array<array-key, mixed> Result array where rows are grouped together by indexes values.
      */
     public static function groupBy(array $array, array $indexes, bool $includeEmpty = false): array
     {
@@ -205,6 +211,12 @@ public static function groupBy(array $array, array $indexes, bool $includeEmpty
      * `dot_array_search()`.
      *
      * @used-by groupBy()
+     *
+     * @param array<array-key, mixed> $result
+     * @param array<array-key, mixed> $row
+     * @param list<string>            $indexes
+     *
+     * @return array<array-key, mixed>
      */
     private static function arrayAttachIndexedValue(
         array $result,
@@ -244,6 +256,11 @@ private static function arrayAttachIndexedValue(
     /**
      * Compare recursively two associative arrays and return difference as new array.
      * Returns keys that exist in `$original` but not in `$compareWith`.
+     *
+     * @param array<array-key, mixed> $original
+     * @param array<array-key, mixed> $compareWith
+     *
+     * @return array<array-key, mixed>
      */
     public static function recursiveDiff(array $original, array $compareWith): array
     {
@@ -284,6 +301,8 @@ public static function recursiveDiff(array $original, array $compareWith): array
 
     /**
      * Recursively count all keys.
+     *
+     * @param array<array-key, mixed> $array
      */
     public static function recursiveCount(array $array, int $counter = 0): int
     {
diff --git a/system/Helpers/array_helper.php b/system/Helpers/array_helper.php
index 4d5d12488d78..f0ea0637c545 100644
--- a/system/Helpers/array_helper.php
+++ b/system/Helpers/array_helper.php
@@ -20,6 +20,8 @@
      * Searches an array through dot syntax. Supports
      * wildcard searches, like foo.*.bar
      *
+     * @param array<array-key, mixed> $array
+     *
      * @return mixed
      */
     function dot_array_search(string $index, array $array)
@@ -32,7 +34,8 @@ function dot_array_search(string $index, array $array)
     /**
      * Returns the value of an element at a key in an array of uncertain depth.
      *
-     * @param int|string $key
+     * @param int|string              $key
+     * @param array<array-key, mixed> $array
      *
      * @return mixed
      */
@@ -78,9 +81,9 @@ function array_deep_search($key, array $array)
      * For information on multi-level array sorting, refer to Example #3 here:
      * https://www.php.net/manual/de/function.array-multisort.php
      *
-     * @param array $array       the reference of the array to be sorted
-     * @param array $sortColumns an associative array of columns to sort
-     *                           after and their sorting flags
+     * @param array<array-key, mixed> $array       The reference of the array to be sorted
+     * @param array<string, int>      $sortColumns An associative array of columns to sort
+     *                                             after and their sorting flags
      */
     function array_sort_by_multiple_keys(array &$array, array $sortColumns): bool
     {
@@ -129,10 +132,10 @@ function array_sort_by_multiple_keys(array &$array, array $sortColumns): bool
     /**
      * Flatten a multidimensional array using dots as separators.
      *
-     * @param iterable $array The multi-dimensional array
-     * @param string   $id    Something to initially prepend to the flattened keys
+     * @param iterable<array-key, mixed> $array The multi-dimensional array
+     * @param string                     $id    Something to initially prepend to the flattened keys
      *
-     * @return array The flattened array
+     * @return array<string, mixed> The flattened array
      */
     function array_flatten_with_dots(iterable $array, string $id = ''): array
     {
@@ -156,11 +159,11 @@ function array_flatten_with_dots(iterable $array, string $id = ''): array
     /**
      * Groups all rows by their index values. Result's depth equals number of indexes
      *
-     * @param array $array        Data array (i.e. from query result)
-     * @param array $indexes      Indexes to group by. Dot syntax used. Returns $array if empty
-     * @param bool  $includeEmpty If true, null and '' are also added as valid keys to group
+     * @param array<array-key, mixed> $array        Data array (i.e. from query result)
+     * @param list<string>            $indexes      Indexes to group by. Dot syntax used. Returns $array if empty
+     * @param bool                    $includeEmpty If true, null and '' are also added as valid keys to group
      *
-     * @return array Result array where rows are grouped together by indexes values.
+     * @return array<array-key, mixed> Result array where rows are grouped together by indexes values.
      */
     function array_group_by(array $array, array $indexes, bool $includeEmpty = false): array
     {
diff --git a/system/Helpers/filesystem_helper.php b/system/Helpers/filesystem_helper.php
index 3f5ed25f8531..f9a04dd142df 100644
--- a/system/Helpers/filesystem_helper.php
+++ b/system/Helpers/filesystem_helper.php
@@ -24,9 +24,10 @@
      * directory will be mapped as well.
      *
      * @param string $sourceDir      Path to source
-     * @param int    $directoryDepth Depth of directories to traverse
-     *                               (0 = fully recursive, 1 = current dir, etc)
+     * @param int    $directoryDepth Depth of directories to traverse (0 = fully recursive, 1 = current dir, etc)
      * @param bool   $hidden         Whether to show hidden files
+     *
+     * @return array<array-key, array<array-key, mixed>|string>
      */
     function directory_map(string $sourceDir, int $directoryDepth = 0, bool $hidden = false): array
     {
@@ -200,6 +201,8 @@ function delete_files(string $path, bool $delDir = false, bool $htdocs = false,
      * @param bool|null $includePath Whether to include the path as part of the filename; false for no path, null for a relative path, true for full path
      * @param bool      $hidden      Whether to include hidden files (files beginning with a period)
      * @param bool      $includeDir  Whether to include directories
+     *
+     * @return list<string>
      */
     function get_filenames(
         string $sourceDir,
diff --git a/system/Helpers/form_helper.php b/system/Helpers/form_helper.php
index a1f7defc4d14..fc67aac601bf 100644
--- a/system/Helpers/form_helper.php
+++ b/system/Helpers/form_helper.php
@@ -23,9 +23,9 @@
      *
      * Creates the opening portion of the form.
      *
-     * @param string       $action     the URI segments of the form destination
-     * @param array|string $attributes a key/value pair of attributes, or string representation
-     * @param array        $hidden     a key/value pair hidden data
+     * @param string                            $action     The URI segments of the form destination
+     * @param array<string, scalar|null>|string $attributes A key/value pair of attributes, or string representation
+     * @param array<string, mixed>              $hidden     A key/value pair hidden data
      */
     function form_open(string $action = '', $attributes = [], array $hidden = []): string
     {
@@ -80,9 +80,9 @@ function form_open(string $action = '', $attributes = [], array $hidden = []): s
      *
      * Creates the opening portion of the form, but with "multipart/form-data".
      *
-     * @param string       $action     The URI segments of the form destination
-     * @param array|string $attributes A key/value pair of attributes, or the same as a string
-     * @param array        $hidden     A key/value pair hidden data
+     * @param string                            $action     The URI segments of the form destination
+     * @param array<string, scalar|null>|string $attributes A key/value pair of attributes, or the same as a string
+     * @param array<string, mixed>              $hidden     A key/value pair hidden data
      */
     function form_open_multipart(string $action = '', $attributes = [], array $hidden = []): string
     {
@@ -103,8 +103,8 @@ function form_open_multipart(string $action = '', $attributes = [], array $hidde
      * Generates hidden fields. You can pass a simple key/value string or
      * an associative array with multiple values.
      *
-     * @param array|string $name  Field name or associative array to create multiple fields
-     * @param array|string $value Field value
+     * @param array<string, mixed>|string         $name  Field name or associative array to create multiple fields
+     * @param array<array-key, mixed>|string|null $value Field value
      */
     function form_hidden($name, $value = '', bool $recursing = false): string
     {
@@ -140,8 +140,8 @@ function form_hidden($name, $value = '', bool $recursing = false): string
      * Text Input Field. If 'type' is passed in the $type field, it will be
      * used as the input type, for making 'email', 'phone', etc input fields.
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_input($data = '', string $value = '', $extra = '', string $type = 'text'): string
     {
@@ -161,8 +161,8 @@ function form_input($data = '', string $value = '', $extra = '', string $type =
      *
      * Identical to the input function but adds the "password" type
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_password($data = '', string $value = '', $extra = ''): string
     {
@@ -181,8 +181,8 @@ function form_password($data = '', string $value = '', $extra = ''): string
      *
      * Identical to the input function but adds the "file" type
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_upload($data = '', string $value = '', $extra = ''): string
     {
@@ -205,8 +205,8 @@ function form_upload($data = '', string $value = '', $extra = ''): string
     /**
      * Textarea field
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_textarea($data = '', string $value = '', $extra = ''): string
     {
@@ -241,8 +241,10 @@ function form_textarea($data = '', string $value = '', $extra = ''): string
     /**
      * Multi-select menu
      *
-     * @param array|string        $name
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, mixed>|string                       $name
+     * @param array<array-key, array<array-key, string>|string> $options
+     * @param array<array-key, int|string>                      $selected
+     * @param array<string, scalar|null>|object|string          $extra    String, array, object that can be cast to array
      */
     function form_multiselect($name = '', array $options = [], array $selected = [], $extra = ''): string
     {
@@ -260,10 +262,10 @@ function form_multiselect($name = '', array $options = [], array $selected = [],
     /**
      * Drop-down Menu
      *
-     * @param array|string        $data
-     * @param array|string        $options
-     * @param array|string        $selected
-     * @param array|object|string $extra    string, array, object that can be cast to array
+     * @param array<string, mixed>|string                              $data
+     * @param array<array-key, array<array-key, string>|string>|string $options
+     * @param array<array-key, int|string>|string                      $selected
+     * @param array<string, scalar|null>|object|string                 $extra    String, array, object that can be cast to array
      */
     function form_dropdown($data = '', $options = [], $selected = [], $extra = ''): string
     {
@@ -348,8 +350,8 @@ function form_dropdown($data = '', $options = [], $selected = [], $extra = ''):
     /**
      * Checkbox Field
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_checkbox($data = '', string $value = '', bool $checked = false, $extra = ''): string
     {
@@ -381,8 +383,8 @@ function form_checkbox($data = '', string $value = '', bool $checked = false, $e
     /**
      * Radio Button
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_radio($data = '', string $value = '', bool $checked = false, $extra = ''): string
     {
@@ -399,8 +401,8 @@ function form_radio($data = '', string $value = '', bool $checked = false, $extr
     /**
      * Submit Button
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_submit($data = '', string $value = '', $extra = ''): string
     {
@@ -412,8 +414,8 @@ function form_submit($data = '', string $value = '', $extra = ''): string
     /**
      * Reset Button
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_reset($data = '', string $value = '', $extra = ''): string
     {
@@ -425,8 +427,8 @@ function form_reset($data = '', string $value = '', $extra = ''): string
     /**
      * Form Button
      *
-     * @param array|string        $data
-     * @param array|object|string $extra string, array, object that can be cast to array
+     * @param array<string, scalar|null>|string        $data
+     * @param array<string, scalar|null>|object|string $extra String, array, object that can be cast to array
      */
     function form_button($data = '', string $content = '', $extra = ''): string
     {
@@ -450,9 +452,9 @@ function form_button($data = '', string $content = '', $extra = ''): string
     /**
      * Form Label Tag
      *
-     * @param string $labelText  The text to appear onscreen
-     * @param string $id         The id the label applies to
-     * @param array  $attributes Additional attributes
+     * @param string                     $labelText  The text to appear onscreen
+     * @param string                     $id         The id the label applies to
+     * @param array<string, scalar|null> $attributes Additional attributes
      */
     function form_label(string $labelText = '', string $id = '', array $attributes = []): string
     {
@@ -477,6 +479,8 @@ function form_label(string $labelText = '', string $id = '', array $attributes =
      * The <datalist> element specifies a list of pre-defined options for an <input> element.
      * Users will see a drop-down list of pre-defined options as they input data.
      * The list attribute of the <input> element, must refer to the id attribute of the <datalist> element.
+     *
+     * @param list<string> $options
      */
     function form_datalist(string $name, string $value, array $options): string
     {
@@ -506,8 +510,8 @@ function form_datalist(string $name, string $value, array $options): string
      * Used to produce <fieldset><legend>text</legend>.  To close fieldset
      * use form_fieldset_close()
      *
-     * @param string $legendText The legend text
-     * @param array  $attributes Additional attributes
+     * @param string                     $legendText The legend text
+     * @param array<string, scalar|null> $attributes Additional attributes
      */
     function form_fieldset(string $legendText = '', array $attributes = []): string
     {
@@ -770,8 +774,8 @@ function validation_show_error(string $field, string $template = 'single'): stri
      *
      * @internal
      *
-     * @param array|string $attributes List of attributes
-     * @param array        $default    Default values
+     * @param array<string, scalar|null>|string $attributes List of attributes
+     * @param array<string, scalar|null>        $default    Default values
      */
     function parse_form_attributes($attributes, array $default): string
     {
diff --git a/system/Helpers/html_helper.php b/system/Helpers/html_helper.php
index 9dcf82536eeb..e206cbd0f5e5 100644
--- a/system/Helpers/html_helper.php
+++ b/system/Helpers/html_helper.php
@@ -24,8 +24,8 @@
      * Generates an HTML unordered list from a single or
      * multidimensional array.
      *
-     * @param array               $list       List entries
-     * @param array|object|string $attributes HTML attributes string, array, object
+     * @param array<array-key, array<array-key, mixed>|string> $list       List entries
+     * @param array<string, scalar|null>|object|string         $attributes HTML attributes string, array, object
      */
     function ul(array $list, $attributes = ''): string
     {
@@ -39,8 +39,8 @@ function ul(array $list, $attributes = ''): string
      *
      * Generates an HTML ordered list from a single or multidimensional array.
      *
-     * @param array               $list       List entries
-     * @param array|object|string $attributes HTML attributes string, array, object
+     * @param array<array-key, array<array-key, mixed>|string> $list       List entries
+     * @param array<string, scalar|null>|object|string         $attributes HTML attributes string, array, object
      */
     function ol(array $list, $attributes = ''): string
     {
@@ -54,8 +54,8 @@ function ol(array $list, $attributes = ''): string
      *
      * Generates an HTML ordered list from a single or multidimensional array.
      *
-     * @param array               $list       List entries
-     * @param array|object|string $attributes HTML attributes string, array, object
+     * @param array<array-key, array<array-key, mixed>|string> $list       List entries
+     * @param array<string, scalar|null>|object|string         $attributes HTML attributes string, array, object
      */
     function _list(string $type = 'ul', $list = [], $attributes = '', int $depth = 0): string
     {
@@ -93,9 +93,9 @@ function _list(string $type = 'ul', $list = [], $attributes = '', int $depth = 0
      *
      * Generates an image element
      *
-     * @param array|string        $src        Image source URI, or array of attributes and values
-     * @param bool                $indexPage  Should `Config\App::$indexPage` be added to the source path
-     * @param array|object|string $attributes Additional HTML attributes
+     * @param array<string, scalar|null>|string        $src        Image source URI, or array of attributes and values
+     * @param bool                                     $indexPage  Should `Config\App::$indexPage` be added to the source path
+     * @param array<string, scalar|null>|object|string $attributes Additional HTML attributes
      */
     function img($src = '', bool $indexPage = false, $attributes = ''): string
     {
@@ -193,8 +193,8 @@ function doctype(string $type = 'html5'): string
      *
      * Generates link to a JS file
      *
-     * @param array|string $src       Script source or an array of attributes
-     * @param bool         $indexPage Should `Config\App::$indexPage` be added to the JS path
+     * @param array<string, scalar|null>|string $src       Script source or an array of attributes
+     * @param bool                              $indexPage Should `Config\App::$indexPage` be added to the JS path
      */
     function script_tag($src = '', bool $indexPage = false): string
     {
@@ -287,10 +287,11 @@ function link_tag(
      * Generates a video element to embed videos. The video element can
      * contain one or more video sources
      *
-     * @param array|string $src                Either a source string or an array of sources
-     * @param string       $unsupportedMessage The message to display if the media tag is not supported by the browser
-     * @param string       $attributes         HTML attributes
-     * @param bool         $indexPage          Should `Config\App::$indexPage` be added to the source path
+     * @param list<string>|string $src                Either a source string or an array of sources
+     * @param string              $unsupportedMessage The message to display if the media tag is not supported by the browser
+     * @param string              $attributes         HTML attributes
+     * @param list<string>        $tracks             Track elements
+     * @param bool                $indexPage          Should `Config\App::$indexPage` be added to the source path
      */
     function video($src, string $unsupportedMessage = '', string $attributes = '', array $tracks = [], bool $indexPage = false): string
     {
@@ -334,10 +335,11 @@ function video($src, string $unsupportedMessage = '', string $attributes = '', a
      *
      * Generates an audio element to embed sounds
      *
-     * @param array|string $src                Either a source string or an array of sources
-     * @param string       $unsupportedMessage The message to display if the media tag is not supported by the browser.
-     * @param string       $attributes         HTML attributes
-     * @param bool         $indexPage          Should `Config\App::$indexPage` be added to the source path
+     * @param list<string>|string $src                Either a source string or an array of sources
+     * @param string              $unsupportedMessage The message to display if the media tag is not supported by the browser.
+     * @param string              $attributes         HTML attributes
+     * @param list<string>        $tracks             Track elements
+     * @param bool                $indexPage          Should `Config\App::$indexPage` be added to the source path
      */
     function audio($src, string $unsupportedMessage = '', string $attributes = '', array $tracks = [], bool $indexPage = false): string
     {
@@ -377,7 +379,9 @@ function audio($src, string $unsupportedMessage = '', string $attributes = '', a
     /**
      * Generate media based tag
      *
-     * @param string $unsupportedMessage The message to display if the media tag is not supported by the browser.
+     * @param list<string> $types              Source elements
+     * @param string       $unsupportedMessage The message to display if the media tag is not supported by the browser.
+     * @param list<string> $tracks             Track elements
      */
     function _media(string $name, array $types = [], string $unsupportedMessage = '', string $attributes = '', array $tracks = []): string
     {
@@ -466,10 +470,11 @@ function track(string $src, string $kind, string $srcLanguage, string $label): s
      * as either image or a resource plugin such as audio, video,
      * Java applets, ActiveX, PDF and Flash
      *
-     * @param string $data       A resource URL
-     * @param string $type       Content-type of the resource
-     * @param string $attributes HTML attributes
-     * @param bool   $indexPage  Should `Config\App::$indexPage` be added to the data path
+     * @param string       $data       A resource URL
+     * @param string       $type       Content-type of the resource
+     * @param string       $attributes HTML attributes
+     * @param list<string> $params     Param elements
+     * @param bool         $indexPage  Should `Config\App::$indexPage` be added to the data path
      */
     function object(string $data, string $type = 'unknown', string $attributes = '', array $params = [], bool $indexPage = false): string
     {
diff --git a/system/Helpers/kint_helper.php b/system/Helpers/kint_helper.php
index 8d8e73bfc92f..02d180328e92 100644
--- a/system/Helpers/kint_helper.php
+++ b/system/Helpers/kint_helper.php
@@ -18,7 +18,7 @@
         /**
          * Prints a Kint debug report and exits.
          *
-         * @param array $vars
+         * @param mixed ...$vars
          *
          * @return never
          *
@@ -38,7 +38,7 @@ function dd(...$vars): void
         /**
          * dd function
          *
-         * @param array $vars
+         * @param mixed ...$vars
          *
          * @return int
          */
@@ -54,7 +54,7 @@ function dd(...$vars)
     /**
      * d function
      *
-     * @param array $vars
+     * @param mixed ...$vars
      *
      * @return int
      */
diff --git a/system/Helpers/number_helper.php b/system/Helpers/number_helper.php
index bf577ed293f6..120e33d795cd 100644
--- a/system/Helpers/number_helper.php
+++ b/system/Helpers/number_helper.php
@@ -134,6 +134,8 @@ function number_to_currency(float $num, string $currency, ?string $locale = null
     /**
      * A general purpose, locale-aware, number_format method.
      * Used by all of the functions of the number_helper.
+     *
+     * @param array<string, float|int|string|null> $options
      */
     function format_number(float $num, int $precision = 1, ?string $locale = null, array $options = []): string
     {
diff --git a/system/Helpers/test_helper.php b/system/Helpers/test_helper.php
index 645d407dfcbf..b455aa301e2f 100644
--- a/system/Helpers/test_helper.php
+++ b/system/Helpers/test_helper.php
@@ -22,11 +22,11 @@
     /**
      * Creates a single item using Fabricator.
      *
-     * @param Model|object|string $model     Instance or name of the model
-     * @param array|null          $overrides Overriding data to pass to Fabricator::setOverrides()
-     * @param bool                $persist
+     * @param Model|object|string       $model     Instance or name of the model
+     * @param array<string, mixed>|null $overrides Overriding data to pass to Fabricator::setOverrides()
+     * @param bool                      $persist
      *
-     * @return array|object
+     * @return array<string, mixed>|object
      */
     function fake($model, ?array $overrides = null, $persist = true)
     {
diff --git a/system/Helpers/text_helper.php b/system/Helpers/text_helper.php
index b8298953bdd3..f8ea0c15447c 100644
--- a/system/Helpers/text_helper.php
+++ b/system/Helpers/text_helper.php
@@ -174,9 +174,9 @@ function entities_to_ascii(string $str, bool $all = true): string
      * matched words will be converted to #### or to the replacement
      * word you've submitted.
      *
-     * @param string $str         the text string
-     * @param array  $censored    the array of censored words
-     * @param string $replacement the optional replacement value
+     * @param string       $str         The text string
+     * @param list<string> $censored    The array of censored words
+     * @param string       $replacement The optional replacement value
      */
     function word_censor(string $str, array $censored, string $replacement = ''): string
     {
@@ -454,9 +454,9 @@ function ellipsize(string $str, int $maxLength, $position = 1, string $ellipsis
      *
      * Removes slashes contained in a string or in an array
      *
-     * @param array|string $str string or array
+     * @param array<array-key, mixed>|string $str string or array
      *
-     * @return array|string string or array
+     * @return array<array-key, mixed>|string string or array
      */
     function strip_slashes($str)
     {
diff --git a/system/Helpers/url_helper.php b/system/Helpers/url_helper.php
index 208ae722a2f2..0b3fa5f72c9c 100644
--- a/system/Helpers/url_helper.php
+++ b/system/Helpers/url_helper.php
@@ -25,11 +25,11 @@
     /**
      * Returns a site URL as defined by the App config.
      *
-     * @param array|string $relativePath URI string or array of URI segments.
-     * @param string|null  $scheme       URI scheme. E.g., http, ftp. If empty
-     *                                   string '' is set, a protocol-relative
-     *                                   link is returned.
-     * @param App|null     $config       Alternate configuration to use.
+     * @param list<string>|string $relativePath URI string or array of URI segments.
+     * @param string|null         $scheme       URI scheme. E.g., http, ftp. If empty
+     *                                          string '' is set, a protocol-relative
+     *                                          link is returned.
+     * @param App|null            $config       Alternate configuration to use.
      */
     function site_url($relativePath = '', ?string $scheme = null, ?App $config = null): string
     {
@@ -46,10 +46,10 @@ function site_url($relativePath = '', ?string $scheme = null, ?App $config = nul
      * Returns the base URL as defined by the App config.
      * Base URLs are trimmed site URLs without the index page.
      *
-     * @param array|string $relativePath URI string or array of URI segments.
-     * @param string|null  $scheme       URI scheme. E.g., http, ftp. If empty
-     *                                   string '' is set, a protocol-relative
-     *                                   link is returned.
+     * @param list<string>|string $relativePath URI string or array of URI segments.
+     * @param string|null         $scheme       URI scheme. E.g., http, ftp. If empty
+     *                                          string '' is set, a protocol-relative
+     *                                          link is returned.
      */
     function base_url($relativePath = '', ?string $scheme = null): string
     {
@@ -146,10 +146,10 @@ function index_page(?App $altConfig = null): string
      *
      * Creates an anchor based on the local URL.
      *
-     * @param array|string        $uri        URI string or array of URI segments
-     * @param string              $title      The link title
-     * @param array|object|string $attributes Any attributes
-     * @param App|null            $altConfig  Alternate configuration to use
+     * @param list<string>|string                      $uri        URI string or array of URI segments
+     * @param string                                   $title      The link title
+     * @param array<string, scalar|null>|object|string $attributes Any attributes
+     * @param App|null                                 $altConfig  Alternate configuration to use
      */
     function anchor($uri = '', string $title = '', $attributes = '', ?App $altConfig = null): string
     {
@@ -179,10 +179,10 @@ function anchor($uri = '', string $title = '', $attributes = '', ?App $altConfig
      * Creates an anchor based on the local URL. The link
      * opens a new window based on the attributes specified.
      *
-     * @param string                    $uri        the URL
-     * @param string                    $title      the link title
-     * @param array|false|object|string $attributes any attributes
-     * @param App|null                  $altConfig  Alternate configuration to use
+     * @param string                                         $uri        the URL
+     * @param string                                         $title      the link title
+     * @param array<string, scalar|null>|false|object|string $attributes any attributes
+     * @param App|null                                       $altConfig  Alternate configuration to use
      */
     function anchor_popup($uri = '', string $title = '', $attributes = false, ?App $altConfig = null): string
     {
@@ -231,9 +231,9 @@ function anchor_popup($uri = '', string $title = '', $attributes = false, ?App $
     /**
      * Mailto Link
      *
-     * @param string              $email      the email address
-     * @param string              $title      the link title
-     * @param array|object|string $attributes any attributes
+     * @param string                                   $email      the email address
+     * @param string                                   $title      the link title
+     * @param array<string, scalar|null>|object|string $attributes any attributes
      */
     function mailto(string $email, string $title = '', $attributes = ''): string
     {
@@ -251,9 +251,9 @@ function mailto(string $email, string $title = '', $attributes = ''): string
      *
      * Create a spam-protected mailto link written in Javascript
      *
-     * @param string              $email      the email address
-     * @param string              $title      the link title
-     * @param array|object|string $attributes any attributes
+     * @param string                                   $email      the email address
+     * @param string                                   $title      the link title
+     * @param array<string, scalar|null>|object|string $attributes any attributes
      */
     function safe_mailto(string $email, string $title = '', $attributes = ''): string
     {
diff --git a/utils/phpstan-baseline/argument.type.neon b/utils/phpstan-baseline/argument.type.neon
index 80cb40694994..282cf8b2aa8b 100644
--- a/utils/phpstan-baseline/argument.type.neon
+++ b/utils/phpstan-baseline/argument.type.neon
@@ -1,4 +1,4 @@
-# total 64 errors
+# total 63 errors
 
 parameters:
     ignoreErrors:
@@ -122,11 +122,6 @@ parameters:
             count: 1
             path: ../../tests/system/HTTP/SiteURITest.php
 
-        -
-            message: '#^Parameter \#2 \$value of function form_hidden expects array\|string, null given\.$#'
-            count: 1
-            path: ../../tests/system/Helpers/FormHelperTest.php
-
         -
             message: '#^Parameter \#1 \$num of function number_to_size expects int\|string, float given\.$#'
             count: 1
diff --git a/utils/phpstan-baseline/loader.neon b/utils/phpstan-baseline/loader.neon
index 57a1c5ee9257..0c6937677154 100644
--- a/utils/phpstan-baseline/loader.neon
+++ b/utils/phpstan-baseline/loader.neon
@@ -1,4 +1,4 @@
-# total 1381 errors
+# total 1285 errors
 
 includes:
     - argument.type.neon
diff --git a/utils/phpstan-baseline/missingType.iterableValue.neon b/utils/phpstan-baseline/missingType.iterableValue.neon
index 518e931c13d8..5c67c58552fd 100644
--- a/utils/phpstan-baseline/missingType.iterableValue.neon
+++ b/utils/phpstan-baseline/missingType.iterableValue.neon
@@ -1,4 +1,4 @@
-# total 1129 errors
+# total 1034 errors
 
 parameters:
     ignoreErrors:
@@ -2737,476 +2737,6 @@ parameters:
             count: 1
             path: ../../system/HTTP/URI.php
 
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arrayAttachIndexedValue\(\) has parameter \$indexes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arrayAttachIndexedValue\(\) has parameter \$result with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arrayAttachIndexedValue\(\) has parameter \$row with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arrayAttachIndexedValue\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arraySearchDot\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:arraySearchDot\(\) has parameter \$indexes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:dotKeyExists\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:dotSearch\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:groupBy\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:groupBy\(\) has parameter \$indexes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:groupBy\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:recursiveCount\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:recursiveDiff\(\) has parameter \$compareWith with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:recursiveDiff\(\) has parameter \$original with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Method CodeIgniter\\Helpers\\Array\\ArrayHelper\:\:recursiveDiff\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/Array/ArrayHelper.php
-
-        -
-            message: '#^Function array_deep_search\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_flatten_with_dots\(\) has parameter \$array with no value type specified in iterable type iterable\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_flatten_with_dots\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_group_by\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_group_by\(\) has parameter \$indexes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_group_by\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_sort_by_multiple_keys\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function array_sort_by_multiple_keys\(\) has parameter \$sortColumns with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function dot_array_search\(\) has parameter \$array with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/array_helper.php
-
-        -
-            message: '#^Function directory_map\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/filesystem_helper.php
-
-        -
-            message: '#^Function get_filenames\(\) return type has no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/filesystem_helper.php
-
-        -
-            message: '#^Function form_button\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_button\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_checkbox\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_checkbox\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_datalist\(\) has parameter \$options with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_dropdown\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_dropdown\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_dropdown\(\) has parameter \$options with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_dropdown\(\) has parameter \$selected with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_fieldset\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_hidden\(\) has parameter \$name with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_hidden\(\) has parameter \$value with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_input\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_input\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_label\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_multiselect\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_multiselect\(\) has parameter \$name with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_multiselect\(\) has parameter \$options with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_multiselect\(\) has parameter \$selected with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_open\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_open\(\) has parameter \$hidden with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_open_multipart\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_open_multipart\(\) has parameter \$hidden with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_password\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_password\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_radio\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_radio\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_reset\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_reset\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_submit\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_submit\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_textarea\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_textarea\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_upload\(\) has parameter \$data with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function form_upload\(\) has parameter \$extra with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function parse_form_attributes\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function parse_form_attributes\(\) has parameter \$default with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/form_helper.php
-
-        -
-            message: '#^Function _list\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function _list\(\) has parameter \$list with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function _media\(\) has parameter \$tracks with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function _media\(\) has parameter \$types with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function audio\(\) has parameter \$src with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function audio\(\) has parameter \$tracks with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function img\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function img\(\) has parameter \$src with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function object\(\) has parameter \$params with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function ol\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function ol\(\) has parameter \$list with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function script_tag\(\) has parameter \$src with no value type specified in iterable type array\.$#'
-            count: 1
-            path: ../../system/Helpers/html_helper.php
-
-        -
-            message: '#^Function ul\(\) has parameter \$attributes with no value type specified in iterable type array\.$#'
-            count: 1
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         -
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