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What would cause this error:

Fatal error: Class 'ZipArchive' not found in /home/test/dummyurl.com/wp-content/themes/mytheme/upload-zip.php on line 14

PHP Version is 5.3.1

Does WP have a built in function I should use instead? Like perhaps the "unzip_file" function line 525 of ./wp-admin/includes/file.php"?

function openZip($file_to_open) { 
    global $target;  
    $zip = new ZipArchive();  //This is line 14
    $x = $zip->open($file_to_open);  
    if($x === true) {  
        $zip->extractTo($target);  
        $zip->close();                
        unlink($file_to_open);  
    } else {  
        die("There was a problem. Please try again!");  
    }  
}
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1 Answer 1

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It means your PHP installation doesn't have the Zip library. You can install it by recompiling PHP with the --enable-zip option, or install the PECL package.

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  • 1
    if you are on shared hosting I would recommend writing to your host to see if they can enable it for your site. They may have it disabled as zipping can be a CPU intensive operation.
    – Bala Clark
    Commented Jan 29, 2011 at 10:40
  • Interesting. How do the wordpress installer routines get around this? I would want to do similar.
    – Scott B
    Commented Jan 29, 2011 at 14:09
  • @Scott B: There is a function unzip_file() which first tries ZipArchive like you do, but if it does not exist it falls back on PclZip, an zip library written in PHP. So I suggest you try to use this function unzip_file() too, as it will probably always exist in WordPress. (Maybe we should rewrite this question so it becomes "How to unzip files without ZipArchive?")
    – Jan Fabry
    Commented Jan 30, 2011 at 9:29
  • I agree, I've added it as a separate question > wordpress.stackexchange.com/questions/8213/…
    – Scott B
    Commented Jan 31, 2011 at 17:20

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