Closure::call

(PHP 7)

Closure::callBinds and calls the closure

Description

public mixed Closure::call ( object $newthis [, mixed $... ] )

Temporarily binds the closure to newthis, and calls it with any given parameters.

Parameters

newthis

The object to bind the closure to for the duration of the call.

...

Zero or more parameters, which will be given as parameters to the closure.

Return Values

Returns the return value of the closure.

Examples

Example #1 Closure::call() example

<?php
class Value {
    protected 
$value;

    public function 
__construct($value) {
        
$this->value $value;
    }

    public function 
getValue() {
        return 
$this->value;
    }
}

$three = new Value(3);
$four = new Value(4);

$closure = function ($delta) { var_dump($this->getValue() + $delta); };
$closure->call($three4);
$closure->call($four4);
?>

The above example will output:

int(7)
int(8)
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User Contributed Notes 1 note

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sergey dot nevmerzhitsky at gmail dot com
7 months ago
Prior PHP 7.0 you can use this code:

<?php
$cl
= function($add) { return $this->a + $add; };

$cl->bindTo($newthis);
return
call_user_func_array($cl, [10]);
?>

But this bind the closure permanently! Also read the article for Closure::bindTo() about binding closures from static context.
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