下面由Laravel教程栏目给大家介绍用laravel框架实现敏感词汇过滤功能的方法，希望对需要的朋友有所帮助！

最近项目有需求，要对用户的签名，回复进行敏感词检测，然后搜到了一个好用的扩展，分享给大家。

https://github.com/FireLustre/php-dfa-sensitive

通过 composer 进行安装：

composer require lustre/php-dfa-sensitive

然后在 app 目录下创建 Services ，并添加 SensitiveWords.php

<?phpnamespace App\Services;use DfaFilter\SensitiveHelper;class SensitiveWords{  protected static $handle = null;  private function __construct()  {  }  private function __clone()  {  }  /**   * 获取实例   */  public static function getInstance($word_path = [])  {    if (!self::$handle) {      //默认的一些敏感词库      $default_path = [        storage_path('dict/bk.txt'),        storage_path('dict/fd.txt'),        storage_path('dict/ms.txt'),        storage_path('dict/qt.txt'),        storage_path('dict/sq.txt'),        storage_path('dict/tf.txt'),      ];      $paths = array_merge($default_path, $word_path);      self::$handle = SensitiveHelper::init();      if (!empty($paths)) {        foreach ($paths as $path) {          self::$handle->setTreeByFile($path);        }      }    }    return self::$handle;  }  /**   * 检测是否含有敏感词   */  public static function isLegal($content)  {    return self::getInstance()->islegal($content);  }  /**   * 敏感词过滤   */  public static function replace($content, $replace_char = '', $repeat = false, $match_type = 1)  {    return self::getInstance()->replace($content, $replace_char, $repeat, $match_type);  }  /**   * 标记敏感词   */  public static function mark($content, $start_tag, $end_tag, $match_type = 1)  {    return self::getInstance()->mark($content, $start_tag, $end_tag, $match_type);  }  /**   * 获取文本中的敏感词   */  public static function getBadWord($content, $match_type = 1, $word_num = 0)  {    return self::getInstance()->getBadWord($content, $match_type, $word_num);  }}

然后我们就可以在项目中，使用 SensitiveWords::getBadWord() 来获取文本中是否有敏感词。

$bad_word = SensitiveWords::getBadWord($content);if (!empty($bad_word)) {  throw new \Exception('包含敏感词:' . current($bad_word));}

在 storage 目录下创建 dict 目录存放敏感词词库，bk.txt …..等等