//定义编码

header( 'Content-Type:text/html;charset=utf-8 ');

$words=array('我','你','他');

$content="测一测我是不是违禁词";

$banned=generateRegularExpression($words);

//检查违禁词

$res_banned=check_words($banned,$content);

write_html($content,$res_banned);

/**

* @describe 数组生成正则表达式

* @param array $words

* @return string

*/

function generateRegularExpression($words)

{

$regular = implode('|', array_map('preg_quote', $words));

return "/$regular/i";

}

/**

* @describe 字符串 生成正则表达式

* @param array $words

* @return string

*/

function generateRegularExpressionString($string){

$str_arr[0]=$string;

$str_new_arr= array_map('preg_quote', $str_arr);

return $str_new_arr[0];

}

/**

* 检查敏感词

* @param $banned

* @param $string

* @return bool|string

*/

function check_words($banned,$string)

{ $match_banned=array();

//循环查出所有敏感词

$new_banned=strtolower($banned);

$i=0;

do{

$matches=null;

if (!empty($new_banned) && preg_match($new_banned, $string, $matches)) {

$isempyt=empty($matches[0]);

if(!$isempyt){

$match_banned = array_merge($match_banned, $matches);

$matches_str=strtolower(generateRegularExpressionString($matches[0]));

$new_banned=str_replace("|".$matches_str."|","|",$new_banned);

$new_banned=str_replace("/".$matches_str."|","/",$new_banned);

$new_banned=str_replace("|".$matches_str."/","/",$new_banned);

}

}

$i++;

if($i>20){

$isempyt=true;

break;

}

}while(count($matches)>0 && !$isempyt);

//查出敏感词

if($match_banned){

return $match_banned;

}

//没有查出敏感词

return array();

}

/**

* 打印到页面上

* @param $filepath

* @param $res_mingan

* @param $res_banned

*/

function write_html($content,$res_banned){

print_r($content);

if($res_banned){

print_r(" 违禁词(".count($res_banned).")：".implode('|',$res_banned));

}

echo "
";

}