PHP 7.0.6 Released

    runkit_method_redefine

    (PECL runkit >= 0.7.0)

    runkit_method_redefine — Dynamically changes the code of the given method

    Description

    bool runkit_method_redefine ( string $classname , string $methodname , string $args , string $code [, int $flags = RUNKIT_ACC_PUBLIC ] )

    Note: This function cannot be used to manipulate the currently running (or chained) method.

    Parameters

    classname

    The class in which to redefine the method

    methodname

    The name of the method to redefine

    args

    Comma-delimited list of arguments for the redefined method

    code

    The new code to be evaluated when methodname is called

    flags

    The redefined method can be RUNKIT_ACC_PUBLIC, RUNKIT_ACC_PROTECTED or RUNKIT_ACC_PRIVATE optionally combined via bitwise OR with RUNKIT_ACC_STATIC (since 1.0.1)

    Note:

    This parameter is only used as of PHP 5, because, prior to this, all methods were public.

    Return Values

    Returns TRUE on success or FALSE on failure.

    Examples

    Example #1 runkit_method_redefine() example

    <?php
    class Example {
        function     foo() {
            return     "foo!\n";
        }
    }

    // create an Example object
    $e = new Example();

    // output Example::foo() (before redefine)
    echo "Before: " . $e->foo();

    // Redefine the 'foo' method
    runkit_method_redefine(
            'Example',
            'foo',
            '',
            'return "bar!\n";',
            RUNKIT_ACC_PUBLIC
    );

    // output Example::foo() (after redefine)
    echo "After: " . $e->foo();
    ?>

    The above example will output:

    Before: foo!
After: bar!

    See Also

    User Contributed Notes

    anton at bondarenko.cc
    4 years ago
    In last runkit versions you can also use RUNKIT_ACC_STATIC constant as flags parametr to redifine static function.
    lauri dot piisang at cashongo dot co dot uk
    3 years ago
    A sample implementation of redefining a public static method of symfony's sfDate to 'travel in time' with runkit:
    <?php
    //Going back in time 3 days
    $subtractablePeriod = 3;
    runkit_method_redefine('sfDateTimeToolkit', 'now', '', 'return strtotime("-'.$subtractablePeriod.' days");', (RUNKIT_ACC_PUBLIC | RUNKIT_ACC_STATIC));   

    //Do Stuff here that would otherwise get the current date

    //Return to realtime
    runkit_method_redefine('sfDateTimeToolkit', 'now', '', 'return time();', (RUNKIT_ACC_PUBLIC | RUNKIT_ACC_STATIC));
    ?>
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