ReflectionMethod::invoke

(PHP 5, PHP 7, PHP 8)

ReflectionMethod::invoke — Invoke

Descrizione

public ReflectionMethod::invoke(?object $object, mixed ...$args): mixed

Invokes a reflected method.

Elenco dei parametri

object: The object to invoke the method on. For static methods, pass null to this parameter.
args: Zero or more parameters to be passed to the method. It accepts a variable number of parameters which are passed to the method.

Valori restituiti

Returns the method result.

Errori/Eccezioni

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.

Esempi

Example #1 ReflectionMethod::invoke() example

<?php
class HelloWorld {

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

}

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

Il precedente esempio visualizzerà:

Hello Mike

Note

Nota:
ReflectionMethod::invoke() cannot be used when reference parameters are expected. ReflectionMethod::invokeArgs() has to be used instead (passing references in the argument list).

Vedere anche:

ReflectionMethod::invokeArgs() - Invoke args
__invoke()
call_user_func() - Call the callback given by the first parameter

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User Contributed Notes 3 notes

down

rojaro at gmail dot com ¶

13 years ago

Note: If you want to invoke protected or private methods, you'll first have to make them accessible using the setAccessible() method (see http://php.net/reflectionmethod.setaccessible ).

down

dimitriy at remerov dot ru ¶

12 years ago

This method can be used to call a overwritten public method of a parent class on an child instance
The following code will output "A":

<?php

class A
{
    public function foo()
    {
        return __CLASS__;
    }
}

class B extends A
{
    public function foo()
    {
        return __CLASS__;
    }
}

$b = new B();

$reflection = new ReflectionObject($b);

$parentReflection = $reflection->getParentClass();

$parentFooReflection = $parentReflection->getMethod('foo');

$data = $parentFooReflection->invoke($b);

echo $data;

?>

down

templargrey at wp dot pl ¶

13 years ago

Seems that Reflection doesn`t resolve late static bindings - var_dump will show "string 'a' (length=1)".



<?php

class ParentClass { protected static $a = 'a'; static public function init() { return static::$a; } }

class ChildClass extends ParentClass { protected static $a = 'b'; }

    

$r = new ReflectionClass('ChildClass');

var_dump($r->getMethod('init')->invoke(null));

?>

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