3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $set1 = ['A', 'B']; $set2 = [1, 2]; function perms( $set1, $set2) { $perms = array(); $i = count( $set1); while( $i >= 0) { $perms[] = p( $set1, $set2); $j = count( $set2); while( $j >= 0) { $perms[] = p( $set1, $set2); $set2[] = array_shift( $set2); $j--; } $set1[] = array_shift( $set1); $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; } sort( $p); return implode( ', ', $p); } print_r( perms( $set1, $set2));
Output for 5.4.0 - 7.1.0
Array ( [0] => A1, B2 [1] => A1, B2 [2] => A2, B1 [3] => A1, B2 [4] => A1, B2 [5] => A1, B2 [6] => A2, B1 [7] => A1, B2 [8] => A1, B2 [9] => A1, B2 [10] => A2, B1 [11] => A1, B2 )
Output for 5.2.3 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/v2QDe on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected '[' in <b>/in/v2QDe</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected '[' in <b>/in/v2QDe</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/v2QDe</b> on line <b>2</b><br />
Process exited with code 255.