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Bugs & Features
<?php $empty_arr = array(); $not_arr = null; $x = array_shift($empty_arr); $not_arr = array_shift($not_arr); var_dump($x); var_dump($not_arr);
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: array_shift() expects parameter 1 to be array, null given in /in/JhD7a on line 6 NULL NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: array_shift() expects parameter 1 to be an array or mutable collection in /in/JhD7a on line 6 NULL NULL
Output for 4.3.2 - 5.2.17
Warning: array_shift(): The argument should be an array in /in/JhD7a on line 6 NULL NULL
Output for 4.3.0 - 4.3.1
Warning: array_shift() [http://www.php.net/function.array-shift]: The argument should be an array in /in/JhD7a on line 6 NULL NULL