<?php

extract($_POST);

$date = date('Y-m-d');

$file_name = $_FILES['image']['name'];//获取缓存区图片,格式不能变

$type = array("jpg", "gif", 'png', 'bmp');//允许选择的图片类型

$ext = explode(".", $file_name);//拆分获取图片名

$ext = $ext[count($ext) - 1];//取图片的后缀名

if (in_array($ext,$type)){

    do{

        $new_name = get_file_name(6).'.'.$ext;

        $path='upload/'.$new_name;

    }while (file_exists("../" . $path));//检查图片是否存在文件夹，存在返回ture,否则false

    $temp_file=$_FILES['image']['tmp_name'];//获取服务器里图片

    include_once ('connect.php');

    $result = $link->exec("UPDATE `news` SET `src`='$path' WHERE id='$img_id'");

    if ($result){

        unlink("../" .$origin);/*移除原来的图片*/

        move_uploaded_file($temp_file,"../" .$path);//移动临时文件到目标路径

        $arr['flag']=1;

    }else{

        $arr['flag']=2;

    }

}else{

    $arr['flag']=3;

}

function get_file_name($len)

{

    $new_file_name = 'A_';

    $chars = "1234567890qwertyuiopasdfghjklzxcvbnm";//随机生成图片名

    for ($i = 0; $i < $len; $i++) {

        $new_file_name .= $chars[mt_rand(0, strlen($chars) - 1)];

    }

    return $new_file_name;

}

echo json_encode($arr);