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<?php $a1 = array('5'); $a2 = array('3'); var_dump(array_diff($a1, $a2)); var_dump($a1-$a2);
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
array(1) { [0]=> string(1) "5" } Fatal error: Uncaught TypeError: Unsupported operand types: array - array in /in/8bNAF:5 Stack trace: #0 {main} thrown in /in/8bNAF on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(1) { [0]=> string(1) "5" } Fatal error: Uncaught Error: Unsupported operand types in /in/8bNAF:5 Stack trace: #0 {main} thrown in /in/8bNAF on line 5
Process exited with code 255.
Output for 4.3.2 - 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, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
array(1) { [0]=> string(1) "5" } Fatal error: Unsupported operand types in /in/8bNAF on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
array(1) { [0]=> string(1) "5" } Fatal error: Unsupported operand types in /in/8bNAF on line 5

preferences:
299.72 ms | 401 KiB | 455 Q