<?php
/**
 * Reorders an array by keys according to a list of values.
 * @param array $array the array to reorder. Passed by reference
 * @param array $list the list to reorder by
 * @param boolean $keepRest if set to FALSE, anything not in the $list array will be removed.
 * @param boolean $prepend if set to TRUE, will prepend the remaining values instead of appending them
 * @author xananax AT yelostudio DOT com
 */
function array_reorder(array &$array,array $list,$keepRest=TRUE,$prepend=FALSE,$preserveKeys=TRUE){
    $temp = array();
    foreach($list as $i){
        if(isset($array[$i])){
            $tempValue = array_slice(
                $array,
                array_search($i,array_keys($array)),
                1,
                $preserveKeys
            );
            $temp[$i] = array_shift($tempValue);
            unset($array[$i]);
        }
    }
    $array = $keepRest ?
        ($prepend? 
            $array+$temp
            :$temp+$array
        )
        : $temp;
}

/** exemple ** /
$a = array(
    'a'    =>    'a',
    'b'    =>    'b',
    'c'    =>    'c',
    'd'    =>    'd',
    'e'    =>    'e'
);
$order = array('c','b','a');

array_reorder($a,$order,TRUE);
echo '<pre>';
print_r($a);
echo '</pre>';
/** exemple end **/
?>