Online PHP editor | output for SaiS9

<?php $arr = array( array ( "L1_ID" => 21, "L1_ATTR_DESC" => "Project Overview", "L2_ATTR_DESC" => "Project Status", "L3_ATTR_DESC" => "Ready" ), array ( "L1_ID" => 21, "L1_ATTR_DESC" => "Project Overview", "L2_ATTR_DESC" => "Project Status", "L3_ATTR_DESC" => "Pending" ), array ( "L1_ID" => 21, "L1_ATTR_DESC" => "Project Overview", "L2_ATTR_DESC" => "Project Status", "L3_ATTR_DESC" => "Completed" ), array ( "L1_ID" => 21, "L1_ATTR_DESC" => "Project Overview", "L2_ATTR_DESC" => "Project Quality", "L3_ATTR_DESC" => "Independ" ), array ( "L1_ID" => 21, "L1_ATTR_DESC" => "Project Overview", "L2_ATTR_DESC" => "Project Quality", "L3_ATTR_DESC" => "G+1" ) ); $ps = array(); foreach($arr as $value){ $index = str_replace(" ", "", strtolower($value['L2_ATTR_DESC'])); $ps[$index][] = $value['L3_ATTR_DESC']; } echo '<pre>'; print_r($ps);