I'd like to add that when dealing with large memory structures, usually arrays, combining them is fastest when done like this: $array1 += $array2; This will not always produce correct results when dealing with arrays that contain identical keys, but for non-overlapping arrays it is far faster than array_merge() And if your script needs to pass large (> 5Mb) arrays around to functions, be sure to use passing-by-reference; failing to do so can double your memory requirements, possibly hitting the ini_set('memory_lmit', ??) $arr = array ( /* much data */ ); function workerFunc (&$data) { //work on $data, as you would normally. } workerFunc (&$arr); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php