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PHP多文件上传操作

Jun 21, 2016 am 08:47 AM
files gt nbsp quot

 

 

其实多文件上传和单文件上传大同小异,原理都是一样的,只是在代码上做了点小技巧。

 

 

 

首先还是index.html上传表单,只是把之前上传文件表单里的file更改成了file[]

 

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upload files

 

   

       

        上传文件:

        上传文件:

        上传文件:
   

       

   

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在upload.php用$_FILES打印看看

 

  print_r($_FILES); 

?>

得出下面多维数组

 

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Array

(

    [file] => Array

        (

            [name] => Array

                (

                    [0] => 照片1.jpg

                    [1] => 照片2.jpg

                    [2] => 照片3.jpg

                )

 

            [type] => Array

                (

                    [0] => image/jpeg

                    [1] => image/jpeg

                    [2] => image/jpeg

                )

 

            [tmp_name] => Array

                (

                    [0] => F:\wamp\tmp\php36C7.tmp

                    [1] => F:\wamp\tmp\php36C8.tmp

                    [2] => F:\wamp\tmp\php36C9.tmp

                )

 

            [error] => Array

                (

                    [0] => 0

                    [1] => 0

                    [2] => 0

                )

 

            [size] => Array

                (

                    [0] => 0

                    [1] => 0

                    [2] => 0

                )

 

        )

 

)

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按照单文件上传的原理,先想想我们需要得到什么?

 

很明显我们需要得到一个关于文件信息的数组,数组里包含name,type,tmp_name,error,size,而此时我们得到的是个多维数组,虽然对应的键值都存在,但它是多维的,

 

我们只需要把它拆分,比如上面的3个文件,我们只需要把它拆分成对应的3个文件信息数组就行了。

 

拆分数组的结构

 

复制代码

Array

(

    [0] => Array

        (

            [name] => 照片1.jpg

            [type] => image/jpeg

            [tmp_name] => F:\wamp\tmp\php13C1.tmp

            [error] => 0

            [size] => 385150

        )

 

    [1] => Array

        (

            [name] => 照片2.jpg

            [type] => image/jpeg

            [tmp_name] => F:\wamp\tmp\php13D2.tmp

            [error] => 0

            [size] => 242043

        )

 

    [2] => Array

        (

            [name] => 照片3.jpg

            [type] => image/jpeg

            [tmp_name] => F:\wamp\tmp\php13D3.tmp

            [error] => 0

            [size] => 488293

        )

 

)

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下面是拆分重组数组代码

 

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    //print_r($_FILES['file']);

    $arr=$_FILES['file'];

    $files=array();

    for($i=0;$i

        $files[$i]['name']=$arr['name'][$i];

        $files[$i]['type']=$arr['type'][$i];

        $files[$i]['tmp_name']=$arr['tmp_name'][$i];

        $files[$i]['error']=$arr['error'][$i];

        $files[$i]['size']=$arr['size'][$i];

    }

 

    print_r($files);

?>

复制代码

 

 

剩下的东西就简单了,重复单文件上传的步骤,遍历处理一遍该数组就行了。

 

代码如下:

 

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    //print_r($_FILES['file']);

    $arr=$_FILES['file'];

    $files=array();

    for($i=0;$i

        $files[$i]['name']=$arr['name'][$i];

        $files[$i]['type']=$arr['type'][$i];

        $files[$i]['tmp_name']=$arr['tmp_name'][$i];

        $files[$i]['error']=$arr['error'][$i];

        $files[$i]['size']=$arr['size'][$i];

    }

 

    for($i=0;$i

    //取得上传文件信息

    $fileName=$files[$i]['name'];

    $fileType=$files[$i]['type'];

    $fileError=$files[$i]['type'];

    $fileSize=$files[$i]['size'];

    $tempName=$files[$i]['tmp_name'];//临时文件名

    

    //定义上传文件类型

    $typeList = array("image/jpeg","image/jpg","image/png","image/gif"); //定义允许的类型

 

    if($fileError>0){

            //上传文件错误编号判断

            switch ($fileError) {

                case 1:

                    $message="上传的文件超过了php.ini 中 upload_max_filesize 选项限制的值。"; 

                    break;

                case 2:

                    $message="上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。"; 

                    break;

                case 3:

                    $message="文件只有部分被上传。"; 

                    break;

                case 4:

                    $message="没有文件被上传。";

                    break;

                case 6:

                    $message="找不到临时文件夹。"; 

                    break;

                case 7:

                    $message="文件写入失败"; 

                    break;

                case 8:

                    $message="由于PHP的扩展程序中断了文件上传";

                    break;

            }

 

            exit("文件上传失败:".$message);

 

        }

    if(!is_uploaded_file($tempName)){

        //判断是否是POST上传过来的文件

        exit("不是通过HTTP POST方式上传上来的");

    }else{

        if(!in_array($fileType, $typeList)){

            exit("上传的文件不是指定类型");

        }else{

            if(!getimagesize($tempName)){

                //避免用户上传恶意文件,如把病毒文件扩展名改为图片格式

                exit("上传的文件不是图片");

            }

        }

            if($fileSize>1000000){

                //对特定表单的上传文件限制大小

                exit("上传文件超出限制大小");

            }else{

                //避免上传文件的中文名乱码

                $fileName=iconv("UTF-8", "GBK", $fileName);//把iconv抓取到的字符编码从utf-8转为gbk输出

                $fileName=str_replace(".", time().".", $fileName);//在图片名称后加入时间戳,避免重名文件覆盖

                if(move_uploaded_file($tempName, "uploads/".$fileName)){

                    echo "上传文件成功!";

                }else{

                    echo "上传文件失败";

                }

            }

 

        }

 

    }

?>



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