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Summarize three methods of php multi-file upload

伊谢尔伦
Release: 2023-03-11 10:46:02
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Introducing three methods of multi- file upload. The first two are to directly traverse the three-dimensional super global array $_FILES. The last one is to first define a single file upload function and then call the function in a loop. Complete the upload of multiple files.

1.当多文件上传表单中多个上传文件的name属性为“pic[]”形式时, 
  也即表单为这种形式: 
<!--lang:html-->
<form action="" method="post" enctype="multipart/form-data"> 
    <input type="hidden" name="MAX_FILE_SIZE"    value=""> 
    <input type="file" name="pic[]" /><br><br> 
    <input type="file" name="pic[]" /><br><br> 
    <input type="file" name="pic[]" /><br><br> 
    <input type="file" name="pic[]" /><br><br> 
    <input type="submit" value="upload"/> 
</form> 
可用foreach 循环 上传多个文件: 
//1.获取要上传文件的信息 
$up_info=$_FILES[&#39;pic&#39;]; 

$ob_path="../system";   

$typelist=array("image/gif","image/jpeg","image/pjpeg","image/png"); //定义运行的上传文件类型 


for($i=0;$i<count($up_info[&#39;name&#39;]);$i++){        //foreach 循环处理多个文件上传 
//2.判断文件是否上传错误 

if($up_info[&#39;error&#39;][$i]>0){ 
    switch($up_info[&#39;error&#39;][$i]){ 
        case 1: 
            $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; 
            break; 
        case 2: 
            $err_info="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: 
            $err_info="文件只有部分被上传"; 
            break; 
        case 4: 
            $err_info="没有文件被上传"; 
            break; 
        case 6: 
            $err_info="找不到临时文件夹"; 
            break; 
        case 7: 
            $err_info="文件写入失败"; 
            break; 
        default: 
            $err_info="未知的上传错误"; 
            break; 
    } 
    continue($err_info); 
} 


//3.判断文件上传的类型是否合法 

if(!in_array($up_info[&#39;type&#39;][$i],$typelist)){ 
    continue(&#39;文件类型错误!&#39;.$up_info[&#39;type&#39;][$i]); 
} 

//4.上传文件的大小过滤 

if($up_info[&#39;size&#39;][$i]>1000000){ 
    continue(&#39;文件大小超过1000000&#39;); 
} 


//5.上传文件名处理 

$exten_name=pathinfo($up_info[&#39;name&#39;][$i],PATHINFO_EXTENSION); 

    do{ 
        $main_name=date(&#39;YmHis&#39;.&#39;--&#39;.rand(100,999));         
        $new_name=$main_name.&#39;.&#39;.$exten_name; 
    }while(file_exists($to_path.&#39;/&#39;.$new_name)); 



//6.判断是否是上传的文件,并执行上传 

if(is_uploaded_file($up_info[&#39;tmp_name&#39;][$i])){ 

        if(move_uploaded_file($up_info[&#39;tmp_name&#39;][$i],$ob_path.&#39;/&#39;.$new_name)){ 
            echo &#39;文件上传成功!&#39;; 
            }else{ 
            echo &#39;上传文件移动失败!&#39;; 
            } 
    }else{ 
        echo &#39;文件不是上传的文件&#39;; 
        } 

}   //for循环的括号 



2.当多文件上传表单中多个上传文件的name属性为“pic,text,doc,pdf”形式时, 
  也即表单为这种形式: 

<form action="" method="post" enctype="multipart/form-data"> 
    <input type="hidden" name="MAX_FILE_SIZE"    value=""> 
    <input type="file" name="pic" /><br><br> 
    <input type="file" name="text" /><br><br> 
    <input type="file" name="doc" /><br><br> 
    <input type="file" name="pdf" /><br><br> 

    <input type="submit" value="upload"/> 

</form> 




也可用foreach 循环 上传多个文件: 

//1.获取要上传文件的信息 
$up_info=$_FILES; 

$ob_path="..\system";   

$typelist=array("image/gif","image/jpeg","image/pjpeg","image/png"); //定义运行的上传文件类型 



foreach($up_info as $k_name=>$value){   //用foreach循环 处理多个文件的上传 
//2.判断文件是否上传错误 

if($up_info[$k_name][&#39;error&#39;]>0){ 
    switch($up_info[&#39;error&#39;][$i]){ 
        case 1: 
            $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; 
            break; 
        case 2: 
            $err_info="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: 
            $err_info="文件只有部分被上传"; 
            break; 
        case 4: 
            $err_info="没有文件被上传"; 
            break; 
        case 6: 
            $err_info="找不到临时文件夹"; 
            break; 
        case 7: 
            $err_info="文件写入失败"; 
            break; 
        default: 
            $err_info="未知的上传错误"; 
            break; 
    } 
    continue($err_info); 
} 


//3.判断文件上传的类型是否合法 

if(!in_array($up_info[$k_name][&#39;type&#39;],$typelist)){ 
    continue(&#39;文件类型错误!&#39;.$up_info[$k_name][&#39;type&#39;]); 
} 

//4.上传文件的大小过滤 

if($up_info[$k_name][&#39;size&#39;]>100000){ 
    echo &#39;文件大小超过**&#39;; 
    continue; 
} 


//5.上传文件名处理 

$exten_name=pathinfo($up_info[$k_name][&#39;name&#39;],PATHINFO_EXTENSION); 

    do{ 
        $main_name=date(&#39;YmHis&#39;.&#39;--&#39;.rand(100,999));         
        $new_name=$main_name.&#39;.&#39;.$exten_name; 
    }while(file_exists($to_path.&#39;/&#39;.$new_name)); 


//6.判断是否是上传的文件,并执行上传 

if(is_uploaded_file($up_info[$k_name][&#39;tmp_name&#39;])){ 

        if(move_uploaded_file($up_info[$k_name][&#39;tmp_name&#39;],$ob_path.&#39;/&#39;.$new_name)){ 
            echo &#39;文件上传成功!&#39;; 
            }else{ 
            echo &#39;上传文件移动失败!&#39;; 
            } 
    }else{ 
        echo &#39;文件不是上传的文件&#39;; 
        } 

}   //for循环的括号 



//3.上面的循环是嵌入到文件上传的代码中的,可能有点不好理解,这儿提供第三种法, 
//先定义单个文件上传的函数,再循环调用这个函数,每次传入一个文件的上传信息, 
//也可以到达多文件上传的目的,而且这种方式,更容易理解。 

//上传的表单的形式和第二种方法中的相同,即: 


    <form action="" method="post" enctype="multipart/form-data"> 
        <input type="hidden" name="MAX_FILE_SIZE" value=""> 
        <input type="file" name="pic1" ><br>             
        <input type="file" name="pic2"><br> 
        <input type="file" name="pic3"><br> 
        <input type="submit" value="upload"> 
    </form> 

//定义函数如下: 

/* 
 *单文件上传函数 
 *@param array $up_info   记录上传文件信息的超全局数组 
 *@param string $to_path  上传文件的目标路径 
 *@param array $typlist   允许的文件类型 
 *@param int    $file_size允许的文件大小 
 *@return string 上传失败,返回失败的原因, 
 * 
 *                成功返回包括文件名的路径。 
 */


function upload_fun($up_info,$to_path,$typelist=array(),$file_size=2000000){ 

    //1.判断文件上传是否错误 

    if($up_file[&#39;error&#39;]>0){ 
        switch($up_info[&#39;error&#39;]){ 
            case 1: 
                $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; 
                break; 
            case 2: 
                $err_info="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: 
                $err_info="文件只有部分被上传"; 
                break; 
            case 4: 
                $err_info="没有文件被上传"; 
                break; 
            case 6: 
                $err_info="找不到临时文件夹"; 
                break; 
            case 7: 
                $err_info="文件写入失败"; 
                break; 
            default: 
                $err_info="未知的上传错误"; 
                break; 
        } 

        return $err_info; 
        die(); 
    } 


    //2.判断上传文件类型是否合法 

    if(count($typelist)>0){ 
        if(!in_array($up_info[&#39;type&#39;],$typelist)){ 

            $err_info=&#39;文件类型不合法!&#39;.$up_info[&#39;type&#39;]; 
            return $err_info; 
            die(); 
        } 
    } 

    //4.判断上传文件大小是否超出允许值 

    if($up_info[&#39;size&#39;]>$file_size){ 

        return $err_info=&#39;文件大小超过&#39;.$file_size; 
        die(); 
} 

    //5.上传文件重命名 

    $exten_name=pathinfo($up_info[&#39;name&#39;],PATHINFO_EXTENSION); 

    do{ 
        $main_name=date(&#39;YmHis&#39;.&#39;--&#39;.rand(100,999));         
        $new_name=$main_name.&#39;.&#39;.$exten_name; 
    }while(file_exists($to_path.&#39;/&#39;.$new_name)); 



    //6.判断是否是上传的文件,并移动文件 

    if(is_uploaded_file($up_info[&#39;tmp_name&#39;])){ 

        if(move_uploaded_file($up_info[&#39;tmp_name&#39;],$to_path.&#39;/&#39;.$new_name)){ 

                $err_info=$to_path.&#39;/&#39;.$new_name; 
            return     $err_info;             
            die(); 
            }else{ 

            return $err_info=&#39;上传文件移动失败!&#39;; 
            die(); 

                } 
    }else{ 

            return $err_info=&#39;这个文件不是上传文件!&#39;; 
            die(); 
    } 

} 


//函数使用方法如下 

$multi_info=$_FILES;  //接收$_FILES的全部上传信息 

$to_path=&#39;system&#39;;      //上传文件的目标路径     

foreach($multi_info as $name=>$up_info){      //foreach 遍历$multi_info  

    $err_info=upload_fun($up_info,$to_path);  //调用单文件上传函数 

    p($err_info);                              //输出返回信息; 

}
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