runkit7_function_redefine
(PECL runkit7 >= Unknown)
runkit7_function_redefine — Replace a function definition with a new implementation
Description
runkit7_function_redefine( string $function_name, string $argument_list, string $code, bool $return_by_reference = null, string $doc_comment = null, string $return_type = ?, bool $is_strict = ? ): bool
runkit7_function_redefine( string $function_name, Closure $closure, string $doc_comment = null, string $return_type = ?, bool $is_strict = ? ): bool
Note: By default, only userspace functions may be removed, renamed, or modified. In order to override internal functions, you must enable the
runkit.internal_overridesetting in php.ini.
Parameters
-
function_name -
Name of function to redefine
-
argument_list -
New list of arguments to be accepted by function
-
code -
New code implementation
-
closure -
A closure that defines the function.
-
return_by_reference -
Whether the function should return by reference.
-
doc_comment -
The doc comment of the function.
-
return_type -
The return type of the function.
-
is_strict -
Whether the function behaves as if it was declared in a file with
strict_types=1
Return Values
Returns true on success or false on failure.
Examples
Example #1 A runkit7_function_redefine() example
<?php
function testme() {
echo "Original Testme Implementation\n";
}
testme();
runkit7_function_redefine('testme','','echo "New Testme Implementation\n";');
testme();
?>
The above example will output:
Original Testme Implementation New Testme Implementation
See Also
- runkit7_function_add() - Add a new function, similar to create_function
- runkit7_function_copy() - Copy a function to a new function name
- runkit7_function_rename() - Change a function's name
- runkit7_function_remove() - Remove a function definition
- runkit7_method_redefine() - Dynamically changes the code of the given method
© 1997–2021 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.runkit7-function-redefine.php
