Introduced in PHP 7: call-method of closures

Code
<?php

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

$foo = new Foo('string');

// Instead of bind to closure you can use call in php 7
$closure = function() {
    return 
md5($this->value);
};

var_dump($closure->call($foo));
Result
string(32) "b45cffe084dd3d20d928bee85e7b0f21"
Used Versions
PHP 7.1, Zend 3.0, Symfony 3.2, Laravel 5.2, PHPUnit 5.6, Doctrine 2.6