3v4l.org

run code in 300+ PHP versions simultaneously
<?php $set1 = ['A', 'B', 'C']; $set2 = [1, 2, 3]; function perms( $set1, $set2) { $perms = array(); $i = count( $set2); while( $i > 0) { $perms[] = p( $set1, $set2); $set2[] = array_shift( $set2); $i--; } return $perms; } function p( $set1, $set2) { $p = array(); for( $i = 0; $i < count( $set1); $i++) { $el1 = $set1[ $i ]; $el2 = $set2[ $i ]; $p[] = $el1.$el2; } return $p; } print_r( perms( $set1, $set2));
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Array ( [0] => A1 [1] => B2 [2] => C3 ) [1] => Array ( [0] => A2 [1] => B3 [2] => C1 ) [2] => Array ( [0] => A3 [1] => B1 [2] => C2 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/PT26j on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/PT26j on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PT26j on line 2
Process exited with code 255.
preferences:
252.35 ms | 401 KiB | 342 Q