关于用laravel框架实现敏感词汇过滤功能

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

<?php
namespace 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

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