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3<?php var_dump(array_diff(array(array(1), array(2)), array(array(3))));
based on QKjtb
Output for hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 array(0) { }
Output for 5.4.0 - 5.6.28
3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 Notice: Array to string conversion in /in/CVc7s on line 3 array(0) { }
Output for 4.3.0 - 5.3.29
3array(0) { }