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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a1 = array('A' => 3, 'B' => 4); $a2 = array(); print_r(array_keys($a1)+array_values($a2)); //print_r($a2+$a1);
based on uCWX3
Output for 4.3.0 - 5.0.5, 5.1.1 - 7.2.0
Array ( [0] => A [1] => B )
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/JI1RU on line 8
Process exited with code 255.