php中fgetcsv函数在php5.2.8 中的数据不完整

function __fgetcsv(& $handle, $length = null, $d = ',', $e = '"') {
     $d = preg_quote($d);
     $e = preg_quote($e);
     $_line = "";
     $eof=false;
     while ($eof != true) {
         $_line .= (empty ($length) ? fgets($handle) : fgets($handle, $length));
         $itemcnt = preg_match_all('/' . $e . '/', $_line, $dummy);
         if ($itemcnt % 2 == 0)
             $eof = true;
     }
     $_csv_line = preg_replace('/(?: |[ ])?$/', $d, trim($_line));
     $_csv_pattern = '/(' . $e . '[^' . $e . ']*(?:' . $e . $e . '[^' . $e . ']*)*' . $e . '|[^' . $d . ']*)' . $d . '/';
     preg_match_all($_csv_pattern, $_csv_line, $_csv_matches);
     $_csv_data = $_csv_matches[1];
     for ($_csv_i = 0; $_csv_i < count($_csv_data); $_csv_i++) {
         $_csv_data[$_csv_i] = preg_replace('/^' . $e . '(.*)' . $e . '$/s', '$1' , $_csv_data[$_csv_i]);
         $_csv_data[$_csv_i] = str_replace($e . $e, $e, $_csv_data[$_csv_i]);
     }
     return empty ($_line) ? false : $_csv_data;
}