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@ 2014-07-02T22:34:18Z

<?php
$foo = null;
$foo = function() use (&$foo){
    var_dump($foo);
  return $foo;  
};

var_dump($foo()->__invoke()==$foo);

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

45.86 ms | 402 KiB | 5 Q