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<?php $nan = acos(8); var_dump($nan == $nan); // bool(true) var_dump($nan == "foo"); // bool(true) var_dump($nan == $nan); // bool(true)
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false) bool(false)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/5XrlT on line 6
Process exited with code 255.