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ReflectionFunction::invoke

(PHP 5, PHP 7, PHP 8)

ReflectionFunction::invokeInvokes function

说明

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

Invokes a reflected function.

参数

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.

返回值

Returns the result of the invoked function call.

示例

示例 #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');
?>

以上示例会输出:

Dr. Phil

注释

注意:

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

参见

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User Contributed Notes 1 note

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spark at limao dot com dot br
12 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");
?>
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