<?php
$set1 = ['A', 'B', 'C'];
$set2 = [1, 2, 3];
function perms( $set1, $set2) {
$perms = array();
$i = count( $set1);
while( $i > 0) {
$perms[] = p( $set1, $set2);
$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;
}
return implode( ', ', $p);
}
print_r( perms( $set1, $set2));
preferences:
33.6 ms | 402 KiB | 5 Q