Yii 1.0 Extract Zip files

Extract Zip Files Using Yii

I have added the source code to extract the zip files using yii

public function actionExtractfile($filename)
{
    $filename='filename';     
    $zipfile=DirDetails."/filename.zip";   
    $zip = zip_open($zipfile);
    $extract=DirDetails."/newfolder";        
    if($zip)
    {
        if(!is_dir($extract))
            mkdir($extract);  
        while ($zip_entry = zip_read($zip)) 
        {
            // if(zip_entry_name($zip_entry)==$filename)
            //if you need any specified file use this condition
            {                    
            $fp = fopen($extract."/".zip_entry_name($zip_entry), "w");                
            if (zip_entry_open($zip, $zip_entry, "r")) 
            {
                $buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
                fwrite($fp,"$buf");
                zip_entry_close($zip_entry);
                fclose($fp);
                break;
            }
            }
        }
        zip_close($zip);
    }
}