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run code in 200+ php & hhvm versions
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<?hh function foo($a, $b) { return $a == $b; } var_dump(foo(keyset[1, 2, 3], keyset['1', '2', '3']));
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Parse error: syntax error, unexpected 'function' (T_FUNCTION) in /in/B7nBb on line 3
Process exited with code 255.
Output for hhvm-3.15.4
bool(false)