Accessing private variables from within a closure

Question

I\'m trying to reference a private variable of an object from within a closure. The code below would seem to work, but it complains Fatal error: Cannot access self:: w

Answer 1

Edit to note, this answer was originally meant for PHP5.3 and earlier, it's possible now. For current information, see this answer.

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This is not directly possible. In particularly, closures have no associated scope, so they cannot access private and protected members.

You can, however, use references:

_var2;
        $closure = function () use ( $value, &$field ) {
            $field = $value;
        };
        $closure();
    }

}

MyClass::setVar1( "hello" );

$myclass = new MyClass;
$myclass->setVar2( "hello" );