runkit_method_redefine

(PECL runkit >= 0.7.0)

runkit_method_redefine — Dynamically changes the code of the given method

Beskrivelse

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.

Advarsel

This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.

Parametre

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

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

Returnerings Værdier

Returns TRUE on success or FALSE on failure.

Eksempler

Eksempel #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!

Se også

runkit_method_add() - Dynamically adds a new method to a given class
runkit_method_copy() - Copies a method from class to another
runkit_method_remove() - Dynamically removes the given method
runkit_method_rename() - Dynamically changes the name of the given method
runkit_function_redefine() - Replace a function definition with a new implementation

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User Contributed Notes 1 note

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lauri dot piisang at cashongo dot co dot uk ¶

11 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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