php 敏感关键词过滤

$badword = array(    '张三','张三丰','张三丰田','上班');$badword1 = array_combine($badword,array_fill(0,count($badword),'*'));$bb = '我今天开着张三丰田上班';$str = strtr($bb, $badword1);echo $str;

$hei=array(    '中国',    '日本');$blacklist="/".implode("|",$hei)."/i";$str="中国一是一个很好的国家";if(preg_match($blacklist, $str, $matches)){    print "found:". $matches[0];} else {    print "not found.";}