导致此错误的原因：

致命错误：在/home/test/dummyurl中找不到类“ZipArchive”。com/wp-content/themes/mytheme/upload-zip。php在线14

PHP版本为5.3.1

WP是否有我应该使用的内置功能？例如的“unzip\\u file”功能行525/wp管理/包括/文件。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!");  
    }  
}