一些面试用到的编程

1，多维数组排序

$arr = array(array('name'=>'d','price'=>'12'),array('name'=>'a','price'=>'16'),array('name'=>'b','price'=>'3'));
function sort_arr($arr,$name,$order){
    $keys = array();
    foreach($arr as $k=>$v){
        $keys[] = $v[$name];
    }
    if($order == 'asc'){
        sort($keys);
    }else{
        rsort($keys);
    }
    $new =array();
    foreach($keys as $v){
        foreach ($arr as $key => $value) {
            if($v == $value[$name]){
                $new[] = $value;
            }
        }
    }
    return $new;
}
print_r(sort_arr($arr,'price','desc'));

2，验证邮箱

"/^[a-zA-Z0-9](\w)+@(\w)+\.(\w)+/"