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

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