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@ 2016-07-19T04:56:14Z

<?php
class X {
    public function filter($n = null) {
        return new X;
    }
}
$a = new X;
$b = $a->filter();
$f = function(){};
$c = $a->filter($f);

var_dump($a, $b, $c, $f);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

102.97 ms | 1485 KiB | 5 Q