ReflectionMethod::invokeArgs

    (PHP 5 >= 5.1.2, PHP 7, PHP 8)

    ReflectionMethod::invokeArgs — Invoke args

    Description

    public ReflectionMethod::invokeArgs(?object $object, array $args): mixed

    Invokes the reflected method and pass its arguments as array.

    Parameters

    object

    The object to invoke the method on. In case of static methods, you can pass null to this parameter.

    args

    The parameters to be passed to the function, as an array.

    Return Values

    Returns the method result.

    Errors/Exceptions

    A ReflectionException if the object parameter does not contain an instance of the class that this method was declared in.

    A ReflectionException if the method invocation failed.

    Changelog

    Version Description
    8.0.0 args keys will now be interpreted as parameter names, instead of being silently ignored.

    Examples

    Example #1 ReflectionMethod::invokeArgs() example

    <?php
    class HelloWorld {

    public function     sayHelloTo($name) {
    return     'Hello ' . $name;
    }

    }

    $reflectionMethod = new ReflectionMethod('HelloWorld', 'sayHelloTo');
    echo     $reflectionMethod->invokeArgs(new HelloWorld(), array('Mike'));
    ?>

    The above example will output:

    Hello Mike

    Notes

    Note:

    If the function has arguments that need to be references, then they must be references in the passed argument list.

    See Also

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    User Contributed Notes 4 notes

    up
    12
    serg dot smertin at gmail dot com
    13 years ago
    We can do black magic, which is useful in templating block calls:

    <?php
    $object    ->__named('methodNameHere', array('arg3' => 'three', 'arg1' => 'one'));

    ...

    /**
    * Pass method arguments by name
    *
    * @param string $method
    * @param array $args
    * @return mixed
    */
    public function __named($method, array $args = array())
    {
    $reflection = new ReflectionMethod($this, $method);

    $pass = array();
    foreach(    $reflection->getParameters() as $param)
    {
    /* @var $param ReflectionParameter */
    if(isset($args[$param->getName()]))
    {
    $pass[] = $args[$param->getName()];
    }
    else
    {
    $pass[] = $param->getDefaultValue();
    }
    }

    return     $reflection->invokeArgs($this, $pass);
    }
    ?>
    up
    4
    agent_harris at secure-mail dot biz
    13 years ago
    There is a simple workaround for the reference passing problem:
    Since the reflection api has to handle all parameters in a generic way it has no chance to guess if you wish to pass data per value or reference.

    But it seems that you can also decide to pass a reference from where you call the function or method (not just only by the ampersand prefix in its declaration).

    So just do the following; which worked for me:

    <?php
    //...
    $method->invoke($object, $inputValue, &$outputValue);
    ?>

    Since this will only be necessary with arrays and primitive data types it should be acceptable in most cases to know in advance if you need to pass per reference. But it is probably although necessary to keep the ampersand always in the declaration (because of the at least two layers between the actual function and your invoke call).

    If this is the expected behavior it will maybe make sense to mention it in the documentation for invoke and invokeArgs.
    up
    2
    CodeCoutureXX at gmail dot com
    8 years ago
    If you need to call ReflectionMethod::invokeArgs() on a static function you can pass NULL in for the $object parameter.

    Example:

    <?php
    class myClass {
    public static     myStaticFunc($a, $b) {
    return     $a + $b;
    }
    }

    $ref = new ReflectionMethod('myClass', 'myStaticFunc');
    echo     $ref->invokeArgs(NULL, [12, 7]);
    ?>

    produces the following output:

    19
    up
    0
    cweiske at cweiske dot de
    13 years ago
    Passing arguments by reference works:
    <?php $rm->invokeArgs($object, array(&$foo, $bar)); ?>
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