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run code in 200+ php & hhvm versions
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<?php $array1 = range(1,12); $array2 = ['1','2','3','5','6','7','8','9','10','11','12']; var_dump(array_value(array_diff($array1, $array2)));
based on aaFWq
Output for 7.0.0 - 7.2.6
Fatal error: Uncaught Error: Call to undefined function array_value() in /in/pHcUJ:6 Stack trace: #0 {main} thrown in /in/pHcUJ on line 6
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Call to undefined function array_value() in /in/pHcUJ:6 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
Fatal error: Call to undefined function array_value() in /in/pHcUJ on line 6
Process exited with code 255.