PHP敏感字过滤

$f = file('words.txt');$words = array();foreach ($f as $w) {	$words[] = preg_quote(trim($w), '/');}$text = file_get_contents('text.txt');$start = microtime(true);$reg = '/' . implode('|', $words) . '/S';preg_match_all($reg, $text, $m);$result = array();$total = 0;foreach ($m[0] as $w) {	if (!isset($result[$w])) {		$result[$w] = 1;	} else {		$result[$w]++;	}	$total++;}$end = microtime(true);echo $end - $start, "\n";echo $total, "\n";print_r($result);

words.txt里面加入av

text.txt里面加入have