// Though not exhaustive lists, better safe than sorry.
270 if (!empty($extensiveCheck))
271 {
272 // Paranoid check. Some like it that way.
273 if (preg_match('~(iframe|\\<\\?|\\<%|html|eval|body|script\W|[CF]WS[\x01-\x0C])~i', $prev_chunk . $cur_chunk) === 1)
274 {
275 fclose($fp);
276 return false;
277 }
278 }
279 else
280 {
281 // Check for potential infection
282 if (preg_match('~(iframe|html|eval|body|script\W|[CF]WS[\x01-\x0C])~i', $prev_chunk . $cur_chunk) === 1)
283 {
284 fclose($fp);
285 return false;
286 }
287 }
288 $prev_chunk = $cur_chunk;
