主要使用了 int substr_count ( string haystack, string needle [, int offset [, int length]] ) 这个方法,这个方法遍历待测的字符串$str中有没有$allergicWord数组中所包含的敏感词:
$allergicWord = array('脏话','骂人话'); $str = '这句话里包含了脏话和骂人话'; for ($i=0;$i<count($allergicWord);$i++){ $content = substr_count($str, $allergicWord[$i]); if($content>0){ $info = $content; break; } } if($info>0){ //有违法字符 return TRUE; }else{ //没有违法字符 return FALSE; }
如果需要将出现的敏感词替换,比如替换###或者***可以结合substr_replace ( mixed string, string replacement, int start [, int length] )方法使用
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关键字的存放形式为txt,txt文件中以这样形式存放:|赌博机|卖血|出售肾|出售器官|眼角膜 <?php function Filter_word( $str, $fileName ) { if ( !($words = file_get_contents( $fileName )) ){ die('file read error!'); } $str = strtolower($str); //var_dump($words); $word = preg_replace("/[1,2,3]\r\n|\r\n/i", '', $words); //$wor = substr($word,0,-1); //$w = preg_replace("|/|i", '\/', $word); //echo "<pre>"; //var_dump($w); //$words = "赌博机|卖血|出售肾|出售器官|眼角膜"; $matched = preg_replace('/'.$word.'/i', '***', $string); return $matched; } $content = "<a href='#'>我要卖血fsdf卖血d 赌博机wo眼口交膜</a>"; if ($result = Filter_word($content, './words.txt') ){ echo $result; echo "替换成功 "; }else{ echo "替换失败! "; } ?>