ReflectionFunction::invoke

(PHP 5, PHP 7, PHP 8)

ReflectionFunction::invoke — Invokes function

Description

public ReflectionFunction::invoke(mixed ...$args): mixed

Invokes a reflected function.

Parameters

args: The passed in argument list. It accepts a variable number of arguments which are passed to the function much like call_user_func() is.

Return Values

Returns the result of the invoked function call.

Examples

Example #1 ReflectionFunction::invoke() example

<?php
function title($title, $name)
{
 return sprintf("%s. %s\r\n", $title, $name);
}

$function = new ReflectionFunction('title');

echo $function->invoke('Dr', 'Phil');
?>

The above example will output:

Dr. Phil

Notes

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

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User Contributed Notes 1 note

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spark at limao dot com dot br ¶

14 years ago

I know Reflections classes have a lot of power, but sometimes all we need is to store a annonymus function or even create a simple callback somewhere.
so here it is, the Callback class:
<?php
 class Callback{
 private $name = false;
 
 public function Callback($obj,$call=false){
 $name = array($obj);
 if($call) $name[] = $call;
 
 $this->name = $name;
 }
 public function invoke($params=array()){
 return call_user_func_array($this->name,$params);
 }
 }
?>

Usage:
<?php
 function sayName(){
 return "goku";
 }
 
 $myVar = new Callback("sayName");
 
 echo "Hi, I am ".$myVar->invoke()."!";
 
 //also works with methods: new Callback($obj,"method");
?>