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run code in 150+ php & hhvm versions
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<?php namespace Foo; while (true){ static $panda = 1; $panda++; }
Output for 5.3.3 - 5.4.12

Process exited with code 137.
Output for 5.2.14 - 5.2.17
Parse error: syntax error, unexpected T_STRING in aC5lR on line 2
Process exited with code 255.