I'm trying to delete file using deleteName and deleteIndex, it returns true but files are not removed. can anybody tell me how could it be?Here is code snippet$zip = new ZipArchive ;$zipname = "www.zip" ;chmod( $zipname, 0777 ) ;if ( $zip->open( $zipname ) ){     $loop = $zip->numFiles ;    for ( $i = 0; $i < $loop; $i++ )    {                var_dump($zip->deleteIndex( $i )) ;        var_dump(deleteName($zip->getNameIndex( $i )). "/") ;    } }$zip->close() ;