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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_override setting 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

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