3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = ['1', '2']; $y = ['2', '1']; $z = ['1', '2', '4']; $n = [1, 2]; echo array_diff($x, $y) === array_diff($y, $x) ? 'y1' : 'n1'; echo array_diff($x) === array_diff($z) ? 'y2' : 'n2'; echo array_diff($z); echo array_diff($x) === array_diff($n) ? 'y3' : 'n3';
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
y1n2 Warning: Array to string conversion in /in/t6duF on line 10 Arrayn3
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.4 - 7.4.33
y1 Warning: array_diff(): at least 2 parameters are required, 1 given in /in/t6duF on line 9 Warning: array_diff(): at least 2 parameters are required, 1 given in /in/t6duF on line 9 y2 Warning: array_diff(): at least 2 parameters are required, 1 given in /in/t6duF on line 10 Warning: array_diff(): at least 2 parameters are required, 1 given in /in/t6duF on line 11 Warning: array_diff(): at least 2 parameters are required, 1 given in /in/t6duF on line 11 y3

preferences:
141.8 ms | 402 KiB | 131 Q