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<?php $anArray = array(1, array()); $anotherArray = array(1); var_dump((is_array($anArray) && is_array($anotherArray) && array_diff($anArray, $anotherArray) === array_diff($anotherArray, $anArray)));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Array to string conversion in /in/AQqb6 on line 7 bool(false)
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/AQqb6 on line 7 bool(false)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 7.3.32 - 7.3.33
bool(false)
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Notice: Array to string conversion in /in/AQqb6 on line 7 Notice: Array to string conversion in /in/AQqb6 on line 7 bool(false)
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Notice: Array to string conversion in /in/AQqb6 on line 7 Notice: Array to string conversion in /in/AQqb6 on line 7 Notice: Array to string conversion in /in/AQqb6 on line 7 bool(false)

preferences:
254.43 ms | 402 KiB | 340 Q