header("Content-Type: text/html; charset=utf-8");

/*print_r($_FILES)*/;//所有传入的图片都在files这个数组里

//得到文件对象

$base64_image_content = $_POST['img'];

 $addName=$_SESSION['username'];

//匹配出图片的格式

if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){

$type = $result[2];

print_r($result);

$new_file = "../usersIMG/";

if(!file_exists($new_file))

{

//检查是否有该文件夹，如果没有就创建，并给予最高权限

mkdir($new_file, 0700);

}

$new_file = $new_file.$addName.".{$type}";

//解码图片

if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){

    $conn=mysqli_connect(MYSQL_HOST,MYSQL_USER,MYSQL_PW,dbname);

    //防止传入数据库里的中文乱码

    mysqli_query($conn,"SET names UTF8");

    $sql="update users set img='$new_file' where username='$addName'";

    $query=mysqli_query($conn,$sql);

    if($query){

       $_SESSION['img']=$new_file;

       echo '保存成功';

   }else {

        echo json_encode(0);

   }

}else{

echo '保存失败';

}

}