Online PHP editor | output for 6PjDN

<?php $myArray = array("100_1", "100_2", "100_3", "101_1", "102_1", "102_2", "103_1", "103_2", "103_3", "104_1", "104_2"); $resultArray = array(); foreach($myArray as $entry) { $parts = explode("_", $entry); $found = FALSE; foreach($resultArray as $key => $resultEntry) { $resultParts = explode("_", $resultEntry); if($parts[0] == $resultParts[0]) { $found = TRUE; if((int)$parts[1] > (int)$resultParts[1]) { $resultArray[$key] = $entry; } } } if(!$found) { $resultArray[] = $entry; } } print_r($resultArray);