[pull] master from php:master

NEWS

@@ -1,6 +1,9 @@
 PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
-?? ??? ????, PHP 8.6.0beta2
+?? ??? ????, PHP 8.6.0beta3
+
+
+27 Aug 2026, PHP 8.6.0beta2
 
 - Core:
   . Fixed bug GH-15375 (Nested "yield from" skips items after a valid() or

UPGRADING

@@ -652,6 +652,12 @@ PHP 8.6 UPGRADE NOTES
 - Phar:
   . Phar::mungServer() now supports reference values.
 
+- Readline:
+  . readline_completion_function() now declares true as its return type. The
+    function assigns a static callback and then tests whether the assignment
+    landed, which is a tautology; an invalid callback throws a TypeError via
+    ZPP before the function body is reached.
+
 - Sockets:
   . socket_addrinfo_lookup() now has an additional optional argument $error
     when not null, and on failure, gives the error code (one of the EAI_*
@@ -664,6 +670,9 @@ PHP 8.6 UPGRADE NOTES
   . header_register_callback() now declares true as its return type. It has not
     been able to return false since PHP 8.0.0, where passing an invalid
     callback started throwing a TypeError instead.
+  . register_tick_function() now declares true as its return type. It has
+    always returned true on success; an invalid callback throws a TypeError
+    via ZPP before the function body is reached.
   . ini_get_all() now includes a "builtin_default_value" element for each
     directive when $details is true. It holds the built-in default value of the
     directive (or null if it has none), independent of values set in php.ini,

ext/readline/readline.c

@@ -489,8 +489,8 @@ PHP_FUNCTION(readline_completion_function)
 
 	/* NOTE: The rl_attempted_completion_function variable (and others) are part of the readline library, not php */
 	rl_attempted_completion_function = php_readline_completion_cb;
-	
-	RETURN_BOOL(rl_attempted_completion_function != NULL);
+
+	RETURN_TRUE;
 }
 
 /* }}} */

ext/readline/readline.stub.php

@@ -29,7 +29,7 @@ function readline_read_history(?string $filename = null): bool {}
 
 function readline_write_history(?string $filename = null): bool {}
 
-function readline_completion_function(callable $callback): bool {}
+function readline_completion_function(callable $callback): true {}
 
 
 #ifdef HAVE_RL_CALLBACK_READ_CHAR

ext/standard/basic_functions.stub.php

@@ -2063,7 +2063,7 @@ function getprotobyname(string $protocol): int|false {}
 function getprotobynumber(int $protocol): string|false {}
 #endif
 
-function register_tick_function(callable $callback, mixed ...$args): bool {}
+function register_tick_function(callable $callback, mixed ...$args): true {}
 
 function unregister_tick_function(callable $callback): void {}