php过滤敏感词

<?php

/**

 * 敏感词过滤工具类

 * 使用方法

 * echo FilterTools::filterContent("你妈的我操一色狼杂种二山食物","*",DIR."config/word.txt",$GLOBALS["p_memcache"]["bad_words"]);

 */

 

class FilterTools {

    public static $keyword = array();

    /**

     * 从文件中加载敏感词

     * @param $filename

     * @return array

     */

    static function getBadWords($filename){

        $file_handle = fopen($filename, "r");

        while (!feof($file_handle)) {

            $line = trim(fgets($file_handle));

            array_push(self::$keyword,$line);

        }

        fclose($file_handle);

        return self::$keyword;

    }

 

    /**

     * @param $content 待处理字符串

     * @param $target  替换后的字符

     * @param $filename  敏感词配置文件

     * @param $memconfig 缓存配置文件

     * @return 处理后的字符串

     */

    static function filterContent($content,$target,$filename,$memconfig){

        $mem = new BadWordsMemcache($filename,$memconfig);

        $keyword = $mem->getList();

        if(count($keyword) == 0){

            $keyword = self::getBadWords($filename);

        }

        return strtr($content, array_combine( $keyword, array_fill(0,count($keyword), $target)));

    }

 

}

 

/**

 * 敏感词缓存处理类

 * Class BadWordsMemcache

 */

class BadWordsMemcache{

    var $memcache;

    var $key;

    var $list;

    var $filename;

    function __construct($filename,$memconfig) {

        $this->filename = $filename;

        if(!class_exists("P_Memcache")){

            require_once DIR."lib/memcache.class.php";

        }

        $this->key = "bad_words";

        $this->memcache = new P_Memcache();

        $this->memcache->config = $memconfig;

        $this->memcache->connect();

        print_r($this->memcache);

        $this->init();

    }

    function __destruct() {

        $this->memcache->close();

    }

 

    /**

     * 初始化

     * @param bool $isReset

     */

    function init($isReset = false){

        $this->list = $this->memcache->get($this->key)?$this->memcache->get($this->key):array();

        if(count($this->list)==0 || $isReset){

            $this->list = filterTools::getBadWords($this->filename);

            $this->memcache->set($this->key, $this->list);

            $log_data = Log::formatData($this->list);

            Log::logWrite($log_data, 'bad.words','init');

        }

    }

 

    /**

     * 获取列表

     * @return mixed

     */

    function getList(){

        return $this->list;

    }

}