<?php  
/**
* php冒泡排序
* by www.jbxue.com
**/
function phpsort($arrs,$a = 'sort'){  
    $arr = $arrs;  
    if(is_array($arr)){  
        for ($i = 0; $i < count($arr); $i++){  
            for ($j = 0;$j < count($arr)-1; $j++){  
                if($a == 'sort'){  
                    if ($arr[$j] > $arr[$j+1]){  
                        $temp = $arr[$j+1];  
                        $arr[$j+1] = $arr[$j];  
                        $arr[$j] = $temp;  
                    }  
                }elseif ($a == 'asort'){
                    if ($arr[$j] < $arr[$j+1]){  
                        $temp = $arr[$j+1];  
                        $arr[$j+1] = $arr[$j];  
                        $arr[$j] = $temp;  
                    }  
                }  
            }  
        }  
    }  
    return $arr;  
} 

//调用示例
$arrs = array(8,4,3,6,1,0,2,22,45);  
$sorts = phpsort($arrs,'sort'); //正向排序  
print_r($sorts);   
echo '<br />';  
$asorts = phpsort($arrs,'asort');//反向排序  
print_r($asorts);   
?>