I wrote the following for merging arrays, in my project mainly for configuration... Thought someone else might find it usefull.
function array_merge_recursive_keys( $first, $second, $greedy=false) {
$inter = array_intersect_assoc(array_keys($first), array_keys($second)); # shaired keys
# the idea next, is to strip and append from $second into $first
foreach ( $inter as $key ) {
# recursion if both are arrays
if ( is_array($first[$key]) && is_array($second[$key]) ) {
$first[$key] = array_merge_recursive_keys($first[$key], $second[$key]);
}
# non-greedy array merging:
else if ( is_array($first[$key] && !$greedy ) ) {
$first[$key][] = $second[$key];
}
else if ( is_array($second[$key]) && !$greedy ) {
$second[$key][] = $first[$key];
$first[$key] = $second[$key];
}
# overwrite...
else {
$first[$key] = $second[$key];
}
unset($second[$key]);
}
# merge the unmatching keys onto first
return array_merge($first, $second);
}
