PHP Manual: Binds 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); };
$closure->call($three, 4);
$closure->call($four, 4);
?>

The above example will output:

int(7)
int(8)