Create a zip file and download it

Question

I am trying to download a 2 files by creating the zip file on local-server.the file is downloaded in zip format but when i try to extract it.it gives error: End-of-central-directory signature not found. Either this file is not a zip file, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zip file comment will be found on the last disk(s) of this archive.

the following code i am using for this:

 <?php $file_names = array('iMUST Operating Manual V1.3a.pdf','iMUST Product Information Sheet.pdf');  //Archive name $archive_file_name=$name.'iMUST_Products.zip';  //Download Files path $file_path=$_SERVER['DOCUMENT_ROOT'].'/Harshal/files/';   zipFilesAndDownload($file_names,$archive_file_name,$file_path);  function zipFilesAndDownload($file_names,$archive_file_name,$file_path) {         //echo $file_path;die;     $zip = new ZipArchive();     //create the file and throw the error if unsuccessful     if ($zip->open($archive_file_name, ZIPARCHIVE::CREATE )!==TRUE) {         exit("cannot open <$archive_file_name>\n");     }     //add each files of $file_name array to archive     foreach($file_names as $files)     {         $zip->addFile($file_path.$files,$files);         //echo $file_path.$files,$files."      }     $zip->close();     //then send the headers to force download the zip file     header("Content-type: application/zip");      header("Content-Disposition: attachment; filename=$archive_file_name");      header("Pragma: no-cache");      header("Expires: 0");      readfile("$archive_file_name");     exit; }     ?> 

i checked the values of all variables which are passing into the function,all are fine.so please look this.Thanks in advance.

Answer 1

Add Content-length header describing size of zip file in bytes.

header("Content-type: application/zip");  header("Content-Disposition: attachment; filename=$archive_file_name"); header("Content-length: " . filesize($archive_file_name)); header("Pragma: no-cache");  header("Expires: 0");  readfile("$archive_file_name"); 

Also make sure that there is absolutely no white space before <? and after ?>. I see a space here:

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 <?php $file_names = array('iMUST Operating Manual V1.3a.pdf','iMUST Product Information Sheet.pdf');