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<?php |
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/** |
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* Class SensitiveWord |
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* @link https://www.icy2003.com/ |
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* @author icy2003 <[email protected]> |
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* @copyright Copyright (c) 2017, icy2003 |
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*/ |
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namespace icy2003\php\ihelpers; |
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use icy2003\php\icomponents\file\LocalFile; |
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use icy2003\php\I; |
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/** |
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* 敏感词过滤 |
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*/ |
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class SensitiveWord |
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{ |
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/** |
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* 敏感词树 |
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* |
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* @var array |
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*/ |
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protected $_map = []; |
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/** |
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* 添加一个敏感词 |
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* |
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* @param string|array $content |
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* |
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* @return static |
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*/ |
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public function add($content) |
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{ |
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$words = Strings::split($content); |
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$temp = &$this->_map; |
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foreach ($words as $word) { |
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if (false === isset($temp[$word])) { |
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$temp[$word] = []; |
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} |
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$temp = &$temp[$word]; |
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} |
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$temp['isFind'] = true; |
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return $this; |
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} |
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/** |
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* 删除一个敏感词 |
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* |
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* @param string|array $content |
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* |
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* @return static |
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*/ |
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public function del($content) |
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{ |
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$words = is_string($content) ? Strings::split($content) : $content; |
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$temp = &$this->_map; |
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foreach ($words as $word) { |
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if (isset($temp[$word])) { |
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$temp = &$temp[$word]; |
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} |
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} |
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$temp['isFind'] = false; |
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return $this; |
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} |
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/** |
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* 从头开始检测一个字符串是否是敏感词 |
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* |
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* - 发现敏感词，则返回该词 |
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* - 没有敏感词，则返回 false |
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* |
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* @param string|array $content |
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* @param boolean $findMore |
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* |
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* @return string|boolean |
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*/ |
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protected function _isStart($content, $findMore = true) |
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{ |
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$words = is_string($content) ? Strings::split($content) : $content; |
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$temp = &$this->_map; |
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$string = ''; |
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$isFind = false; |
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foreach ($words as $word) { |
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if (isset($temp[$word])) { |
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$string .= $word; |
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if (true === I::get($temp[$word], 'isFind')) { |
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$isFind = true; |
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if (true === $findMore) { |
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$temp = &$temp[$word]; |
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continue; |
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} else { |
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return $string; |
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} |
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} else { |
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$isFind = false; |
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$temp = &$temp[$word]; |
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continue; |
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} |
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} |
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return true === $isFind ? $string : false; |
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} |
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} |
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/** |
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* 查找一段文本里所有敏感词 |
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* |
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* @param string|array $content |
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* |
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* @return array |
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*/ |
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public function find($content) |
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{ |
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$words = is_string($content) ? Strings::split($content) : $content; |
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$strings = []; |
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while (true) { |
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if (empty($words)) { |
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return $strings; |
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} |
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$string = $this->_isStart($words); |
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if (is_string($string)) { |
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$strings[] = $string; |
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} |
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array_shift($words); |
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} |
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} |
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/** |
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* 返回替换敏感词后的文本 |
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* |
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* @param string|array $content |
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* @param string $char |
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* |
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* @return string |
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*/ |
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public function replace($content, $char = '*') |
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{ |
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$words = $this->find($content); |
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$content = implode('', $words); |
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$array = []; |
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foreach ($words as $word) { |
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$array[$word] = Strings::repeat($char, Strings::length($word)); |
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} |
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return Strings::replace($content, $array); |
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} |
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/** |
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* 返回敏感词树 |
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* |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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return $this->_map; |
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} |
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/** |
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* 导出敏感词树到 php 文件 |
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* |
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* @param string|null $file |
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* |
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* @return void |
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*/ |
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public function toPhp($file = null) |
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{ |
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null === $file && $file = __DIR__ . '/' . date('YmdHis') . '.php'; |
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$local = new LocalFile(); |
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$array = Arrays::export($this->toArray(), true); |
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$local->putFileContent($file, <<<EOT |
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<?php |
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return {$array}; |
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EOT); |
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} |
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} |
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icy2003 /
php
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