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<Closure::__constructClosure::bindTo>
^ClosureLast updated: Mon, 26 Oct 2026

Closure::bind

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

Closure::bind — Duplicates a closure with a specific bound object and class scope

Description

public static function Closure::bind(Closure $closure, ?object $newThis, object|string|null $newScope = "static"): ?Closure

This method is a static version of Closure::bindTo(). See the documentation of that method for more information.

Parameters

closure

The anonymous functions to bind.

newThis

The object to which the given anonymous function should be bound, or null for the closure to be unbound.

newScope

The class scope to which the closure is to be associated, or 'static' to keep the current one. If an object is given, the type of the object will be used instead. This determines the visibility of protected and private methods of the bound object. It is not allowed to pass (an object of) an internal class as this parameter.

Return Values

Returns a new Closure object, or null on failure.

Changelog

Version Description
8.5.0 Binding an instance to a static closure, or binding a method from an incompatible class hierarchy, is now deprecated (these cases already emitted an E_WARNING).

Examples

Example #1 Closure::bind() example

<?php
class A {
    private static $sfoo = 1;
    private $ifoo = 2;
}
$cl1 = static function() {
    return A::$sfoo;
};
$cl2 = function() {
    return $this->ifoo;
};

$bcl1 = Closure::bind($cl1, null, 'A');
$bcl2 = Closure::bind($cl2, new A(), 'A');
echo $bcl1(), "\n";
echo $bcl2(), "\n";
?>

The above example will output something similar to:

1
2

See Also


<Closure::__constructClosure::bindTo>
^ClosureLast updated: Mon, 26 Oct 2026