How to implement php multi-file upload encapsulation

Multiple file upload implementation

1 Use single file encapsulation

请选择您要上传的文件：

请选择您要上传的文件：

请选择您要上传的文件：

请选择您要上传的文件：

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('jpeg','jpg','png','tif'),$maxSize=10485760){
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
 









请选择您要上传的文件：

请选择您要上传的文件：

请选择您要上传的文件：

请选择您要上传的文件：




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
                )
        )
)
 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['name'])){  //单文件判定
            $files[$i]=$file;
            $i++;
        }elseif(is_array($file['name'])){
            foreach($file['name'] as $key=>$val){  //我的天，这个$key用的diao
                $files[$i]['name']=$file['name'][$key];
                $files[$i]['type']=$file['type'][$key];
                $files[$i]['tmp_name']=$file['tmp_name'][$key];
                $files[$i]['error']=$file['error'][$key];
                $files[$i]['size']=$file['size'][$key];
                $i++;
            }
        }
    }
    return $files;
    
}
 Then if there is an exit error like before, just change the exit. Use res
 here 
function uploadFile($fileInfo,$path='./uploads',$flag=true,$maxSize=1048576,$allowExt=array('jpeg','jpg','png','gif')){
    //$flag=true;
    //$allowExt=array('jpeg','jpg','gif','png');
    //$maxSize=1048576;//1M
    //判断错误号
    $res=array();
    if($fileInfo['error']===UPLOAD_ERR_OK){
        //检测上传得到小
        if($fileInfo['size']>$maxSize){
            $res['mes']=$fileInfo['name'].'上传文件过大';
        }
        $ext=getExt($fileInfo['name']);
        //检测上传文件的文件类型
        if(!in_array($ext,$allowExt)){
            $res['mes']=$fileInfo['name'].'非法文件类型';
        }
        //检测是否是真实的图片类型
        if($flag){
            if(!getimagesize($fileInfo['tmp_name'])){
                $res['mes']=$fileInfo['name'].'不是真实图片类型';
            }
        }
        //检测文件是否是通过HTTP POST上传上来的
        if(!is_uploaded_file($fileInfo['tmp_name'])){
            $res['mes']=$fileInfo['name'].'文件不是通过HTTP POST方式上传上来的';
        }
        if($res) return $res;
        //$path='./uploads';
        if(!file_exists($path)){
            mkdir($path,0777,true);
            chmod($path,0777);
        }
        $uniName=getUniName();
        $destination=$path.'/'.$uniName.'.'.$ext;
        if(!move_uploaded_file($fileInfo['tmp_name'],$destination)){
            $res['mes']=$fileInfo['name'].'文件移动失败';
        }
        $res['mes']=$fileInfo['name'].'上传成功';
        $res['dest']=$destination;
        return $res;
        
    }else{
        //匹配错误信息
        switch ($fileInfo ['error']) {
            case 1 :
                $res['mes'] = '上传文件超过了PHP配置文件中upload_max_filesize选项的值';
                break;
            case 2 :
                $res['mes'] = '超过了表单MAX_FILE_SIZE限制的大小';
                break;
            case 3 :
                $res['mes'] = '文件部分被上传';
                break;
            case 4 :
                $res['mes'] = '没有选择上传文件';
                break;
            case 6 :
                $res['mes'] = '没有找到临时目录';
                break;
            case 7 :
            case 8 :
                $res['mes'] = '系统错误';
                break;
        }
        return $res;
    }
}
 encapsulates two small 
function getExt($filename){
    return strtolower(pathinfo($filename,PATHINFO_EXTENSION));
}
/**
 * 产生唯一字符串
 * @return string
 */
function getUniName(){
    return md5(uniqid(microtime(true),true));
}
 and then uses the multiple attribute to input multiple files statically; 









请选择您要上传的文件：




';
    $uploadFiles[]=@$res['dest'];
}
$uploadFiles=array_values(array_filter($uploadFiles));
//print_r($uploadFiles);
 Several files like this can achieve a more powerful implementation The process-oriented function of uploading files. 
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