How to implement php multi-file upload encapsulation-PHP Tutorial-php.cn

How to implement php multi-file upload encapsulation

伊谢尔伦

Release： 2023-03-11 16:32:01

Original

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Multiple file upload implementation

1 Use single file encapsulation

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="doAction5.php" method="post" enctype="multipart/form-data">
请选择您要上传的文件：<input type="file" name="myFile1" /><br/>
请选择您要上传的文件：<input type="file" name="myFile2" /><br/>
请选择您要上传的文件：<input type="file" name="myFile3" /><br/>
请选择您要上传的文件：<input type="file" name="myFile4" /><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>

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<?php
//print_r($_FILES);
header(&#39;content-type:text/html;charset=utf-8&#39;);
include_once &#39;upFunc.php&#39;;
foreach ($_FILES as $fileInfo){
    $file[]=uploadFile($fileInfo);
}

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The idea here is found in print_r($_FILES). When it is printed out, it is a two-dimensional array, which is very It’s simple, just go through it and use it!

Change the definition of the function above and give some default values

function uploadFile($fileInfo,$path="uploads",$allowExt=array(&#39;jpeg&#39;,&#39;jpg&#39;,&#39;png&#39;,&#39;tif&#39;),$maxSize=10485760){

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This way, it is simple, but there are some problems.

It is no problem to upload 4 pictures normally, but if the exit in the function is activated in the middle, it will stop immediately, causing other pictures to be unable to be uploaded.

2 Upgraded version of encapsulation

Aims to implement encapsulation for multiple or single file uploads

First write a static file like this

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="doAction5.php" method="post" enctype="multipart/form-data">
请选择您要上传的文件：<input type="file" name="myFile[]" /><br/>
请选择您要上传的文件：<input type="file" name="myFile[]" /><br/>
请选择您要上传的文件：<input type="file" name="myFile[]" /><br/>
请选择您要上传的文件：<input type="file" name="myFile[]" /><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>

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Print $_FILES

Array
(
    [myFile] => Array
        (
            [name] => Array
                (
                    [0] => test32.png
                    [1] => test32.png
                    [2] => 333.png
                    [3] => test41.png
                )
            [type] => Array
                (
                    [0] => image/png
                    [1] => image/png
                    [2] => image/png
                    [3] => image/png
                )
            [tmp_name] => Array
                (
                    [0] => D:\wamp\tmp\php831C.tmp
                    [1] => D:\wamp\tmp\php834C.tmp
                    [2] => D:\wamp\tmp\php837C.tmp
                    [3] => D:\wamp\tmp\php83BB.tmp
                )
            [error] => Array
                (
                    [0] => 0
                    [1] => 0
                    [2] => 0
                    [3] => 0
                )
            [size] => Array
                (
                    [0] => 46174
                    [1] => 46174
                    [2] => 34196
                    [3] => 38514
                )
        )
)

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to get a three-dimensional array.

Complexity is complicated, but it is complicated in a regular way. All the values are together, which is very convenient for us to get the values! !

So first get the file information and turn it into a single file processing information

function getFiles(){
    $i=0;
    foreach($_FILES as $file){
        if(is_string($file[&#39;name&#39;])){  //单文件判定
            $files[$i]=$file;
            $i++;
        }elseif(is_array($file[&#39;name&#39;])){
            foreach($file[&#39;name&#39;] as $key=>$val){  //我的天，这个$key用的diao
                $files[$i][&#39;name&#39;]=$file[&#39;name&#39;][$key];
                $files[$i][&#39;type&#39;]=$file[&#39;type&#39;][$key];
                $files[$i][&#39;tmp_name&#39;]=$file[&#39;tmp_name&#39;][$key];
                $files[$i][&#39;error&#39;]=$file[&#39;error&#39;][$key];
                $files[$i][&#39;size&#39;]=$file[&#39;size&#39;][$key];
                $i++;
            }
        }
    }
    return $files;
    
}

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Then if there is an exit error like before, just change the exit. Use res

here

function uploadFile($fileInfo,$path=&#39;./uploads&#39;,$flag=true,$maxSize=1048576,$allowExt=array(&#39;jpeg&#39;,&#39;jpg&#39;,&#39;png&#39;,&#39;gif&#39;)){
    //$flag=true;
    //$allowExt=array(&#39;jpeg&#39;,&#39;jpg&#39;,&#39;gif&#39;,&#39;png&#39;);
    //$maxSize=1048576;//1M
    //判断错误号
    $res=array();
    if($fileInfo[&#39;error&#39;]===UPLOAD_ERR_OK){
        //检测上传得到小
        if($fileInfo[&#39;size&#39;]>$maxSize){
            $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;上传文件过大&#39;;
        }
        $ext=getExt($fileInfo[&#39;name&#39;]);
        //检测上传文件的文件类型
        if(!in_array($ext,$allowExt)){
            $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;非法文件类型&#39;;
        }
        //检测是否是真实的图片类型
        if($flag){
            if(!getimagesize($fileInfo[&#39;tmp_name&#39;])){
                $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;不是真实图片类型&#39;;
            }
        }
        //检测文件是否是通过HTTP POST上传上来的
        if(!is_uploaded_file($fileInfo[&#39;tmp_name&#39;])){
            $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;文件不是通过HTTP POST方式上传上来的&#39;;
        }
        if($res) return $res;
        //$path=&#39;./uploads&#39;;
        if(!file_exists($path)){
            mkdir($path,0777,true);
            chmod($path,0777);
        }
        $uniName=getUniName();
        $destination=$path.&#39;/&#39;.$uniName.&#39;.&#39;.$ext;
        if(!move_uploaded_file($fileInfo[&#39;tmp_name&#39;],$destination)){
            $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;文件移动失败&#39;;
        }
        $res[&#39;mes&#39;]=$fileInfo[&#39;name&#39;].&#39;上传成功&#39;;
        $res[&#39;dest&#39;]=$destination;
        return $res;
        
    }else{
        //匹配错误信息
        switch ($fileInfo [&#39;error&#39;]) {
            case 1 :
                $res[&#39;mes&#39;] = &#39;上传文件超过了PHP配置文件中upload_max_filesize选项的值&#39;;
                break;
            case 2 :
                $res[&#39;mes&#39;] = &#39;超过了表单MAX_FILE_SIZE限制的大小&#39;;
                break;
            case 3 :
                $res[&#39;mes&#39;] = &#39;文件部分被上传&#39;;
                break;
            case 4 :
                $res[&#39;mes&#39;] = &#39;没有选择上传文件&#39;;
                break;
            case 6 :
                $res[&#39;mes&#39;] = &#39;没有找到临时目录&#39;;
                break;
            case 7 :
            case 8 :
                $res[&#39;mes&#39;] = &#39;系统错误&#39;;
                break;
        }
        return $res;
    }
}

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encapsulates two small

function getExt($filename){
    return strtolower(pathinfo($filename,PATHINFO_EXTENSION));
}
/**
 * 产生唯一字符串
 * @return string
 */
function getUniName(){
    return md5(uniqid(microtime(true),true));
}

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and then uses the multiple attribute to input multiple files statically;

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="doAction6.php" method="POST" enctype="multipart/form-data">
请选择您要上传的文件：<input type="file" name="myFile[]" multiple=&#39;multiple&#39; /><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>

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<?php 
//print_r($_FILES);
header("content-type:text/html;charset=utf-8");
require_once &#39;upFunc2.php&#39;;
require_once &#39;common.func.php&#39;;
$files=getFiles();
// print_r($files);
foreach($files as $fileInfo){
    $res=uploadFile($fileInfo);
    echo $res[&#39;mes&#39;],&#39;<br/>&#39;;
    $uploadFiles[]=@$res[&#39;dest&#39;];
}
$uploadFiles=array_values(array_filter($uploadFiles));
//print_r($uploadFiles);

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Several files like this can achieve a more powerful implementation The process-oriented function of uploading files.

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