快速排序（php实现）

<?php
function p($myArr,$low,$high){
    $key = $myArr[$low];
    while($low < $high){
        while($low < $high && $key <= $myArr[$high]){
            $high --;
        }
        $tmp = $myArr[$low];
        $myArr[$low] = $myArr[$high];
        $myArr[$high] = $tmp;
        while($low < $high && $key >= $myArr[$low]){
            $low ++;
        }
        $tmp = $myArr[$low];
        $myArr[$low] = $myArr[$high];
        $myArr[$high] = $tmp;
    }
    return $low;
}
function qSort($myArr,$low,$high){
    if($low < $high){
        $keysite = p($myArr,$low,$high);
        qSort($myArr,$low,$keysite-1);
        qSort($myArr,$keysite+1,$high);
    }
}
$myArr = array(49,38,65,97,76,13,27);
qSort($myArr,0,6);
foreach($myArr as $value){
    echo $value.'<br>';
}
?>