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run code in 150+ php & hhvm versions
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<?php $foo = null; $name = 'this'; var_dump(array($$name)); var_dump(array(&(isset($$name) ? $$name : $$name)));
Output for 5.3.0 - 5.4.26
Parse error: syntax error, unexpected '(' in /in/ttZsB on line 5
Process exited with code 255.