一个高效的敏感词过滤方法(PHP)

$badword = array(
    "张三","张三丰","张三丰田"
);
$badword1 = array_combine($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.";
  }