<?php
$root = array( 1=>'cat1', 2=>'cat2', 3=>'cat3' );
$child_1 = array( 1=>'sub_cat1', 2=>'sub_cat2', 3=>'sub_cat3' );
$child_2 = array( 1=>'sub_sub_cat1', 2=>'sub_sub_cat2', 3=>'sub_sub_cat3' );
function getAllCombinationsArray($source_arrays = array(), $key = '', $value = ''){
$return = array();
$current = array_shift($source_arrays);
foreach($current as $ck => $cv) {
$ckey = $key.$ck;
$cvalue = $value.$cv;
if(!empty($source_arrays)) {
$return += getAllCombinationsArray($source_arrays, $ckey.'_', $cvalue.' -> ');
} else {
$return[$ckey] = $cvalue;
}
}
return $return;
}
print_r(getAllCombinationsArray(array($root, $child_1, $child_2)));
preferences:
52.64 ms | 402 KiB | 5 Q