1.2.153. Closure May Use $this

$this is automatically accessible to closures.

When closures were introduced in PHP, they couldn’t use the $this variable, making is cumbersome to access local properties when the closure <https://www.php.net/`closure>`_ was created within an object. This is not the case anymore since PHP 5.4.

<?php

// Invalid code in PHP 5.4 and less
class Test
{
    public function testing()
    {
        return function() {
            var_dump($this);
        };
    }
}

$object = new Test;
$function = $object->testing();
$function();

?>

See also Anonymous functions.

1.2.153.1. Specs

Short name	Php/ClosureThisSupport
Rulesets	All, Changed Behavior, CompatibilityPHP53
Exakat since	0.8.4
PHP Version	With PHP 5.4 and older
Severity	Minor
Time To Fix	Quick (30 mins)
Changed Behavior	PHP 5.4 - More
Precision	Very high
Features	closure, $this
Available in	Entreprise Edition, Exakat Cloud