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run code in 150+ php & hhvm versions
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<?php function mutabledefault($arg=var_dump("hiss")) { var_dump($arg); } mutabledefault(); mutabledefault();
Output for 5.3.0 - 5.4.28
Parse error: syntax error, unexpected '(', expecting ')' in /in/Yjumb on line 3
Process exited with code 255.