Pictures download batch compression packing

    function downloadZipImg public (picAllArr $, $ enterprise_id) 
    { 
// $ picAllArr = [ 
// 'https://dss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2333857494,1212940832&fm=26&gp=0.jpg', 
// ' https://dss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=3808706043,3843571795&fm=26&gp=0.jpg ' 
//]; 

        $ tmpDir =' ./static/zip/images/ '; // similar / www / public / Upload / 

        (! the file_exists ($ tmpDir)) IF { 
            // Create a folder 
            mkdir ($ tmpDir, 0777, to true); 
        } 

        // zipName = DATE $ ( 'His-') the mt_rand (1000, 9999).. '.zip'; // archive file name 
        $ zipName = $ enterprise_id '.zip' .;
        . $ zipNameUrl = $ tmpDir $ zipName ; // file path

        // delete files compressed before 
        unlink ($ zipNameUrl); // delete a file 


        // file generated 
        $ = new new ZIP \ ZipArchive (); 
        IF (zip-$> Open ($ zipNameUrl, \ ZipArchive :: OVERWRITE) ==! to true) { 
            // oVERWRITE parameter overrides the archive file must already exist 
            IF (zip-$> Open ($ zipNameUrl, \ :: ZipArchive the CREATE)! == to true) { 
                // the file does not exist, create a new the files are opened using the additional content files to the CREATE ZIP 
                return 'download fails, the folder does not exist'; 
            } 
        } 
        the foreach ($ $ file picAllArr AS) { 
            // determines whether there is image 
            $ isFile = $ this-> checkFileExists ( $ file ); 
            ! IF ($ isFile) { 
                Continue; 
            } 
            // crawl graphic content
            file_get_contents fileContent = $ ($ File); 
            // Add image 
            $ File = substr ($ File, 0, -13); 
            $ zip-> AddFromString (the basename ($ File), $ fileContent); 
        } 
        // close 
        $ zip- > use Close (); 

        // no file 
        IF {(file_exists ($ zipNameUrl)!) 
            return 'download failed, the picture does not exist or can not be downloaded'; 
        } 

// header ( "Cache-Control: public"); 
// header ( "Content-the Description: file Transfer"); 
// header ( 'Content-Disposition: Attachment; filename ='. $ zipName); // file name 
// header ( "Content-Type: application / zip"); // zip format 
// // header ( "Content-Type :application / octet-stream ' "); // zip format
// header ( "Content-Transfer- Encoding: binary"); // tell the browser, which is a binary file
// header ( 'Content-Length: '. Filesize ($ zipNameUrl)); // tells the browser, file size 
// 
// // the following two steps must be 
// ob_clean (); 
// flush (); 
        / / @ ReadFile ($ zipNameUrl); 
        // unlink ($ zipNameUrl); // delete the file 
        return substr ($ zipNameUrl, 2); 
    }