Summary of implementation methods for shielding and filtering specified keywords in PHP_PHP Tutorial

We often find that where we submit a reservation, there will be a lot of advertisements. Later, I wanted to make a function of blocking and filtering specified keywords. I searched for several methods and introduced them to everyone who needs to know. Friends can refer to it.

Things:
1. Write the keywords specifically in a text file, one per line. There is no limit to the number. Write as many as you want.
2. PHP reads the keyword text and stores it in an array
3. Traverse the keyword array and use the strpos function one by one to see if there are keywords in the content. If there are keywords, return true, if not, return false

The PHP code is as follows:

// Keyword filter function function keyWordCheck($content){

The code is as follows

代码如下

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/* PHP中用strpos函数过滤关键字 */ // 关键字过滤函数 function keyWordCheck($content){ // 去除空白 $content = trim($content); // 读取关键字文本 $content = @file_get_contents('keyWords.txt'); // 转换成数组 $arr = explode("n", $content); // 遍历检测 for($i=0,$k=count($arr);$i<$k;$i++){ // 如果此数组元素为空则跳过此次循环 if($arr[$i]==''){ continue; } // 如果检测到关键字，则返回匹配的关键字,并终止运行 if(@strpos($str,trim($arr[$i]))!==false){ //$i=$k; return $arr[$i]; } } // 如果没有检测到关键字则返回false return false; } $content = '这里是要发布的文本内容。。。'; // 过滤关键字 $keyWord = keyWordCheck($content); // 判断是否存在关键字 if($keyWord){ echo '你发布的内容存在关键字'.$keyWord; }else{ echo '恭喜！通过关键字检测'; // 往下可以进行写库操作完成发布动作。 }

Copy code

代码如下

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/** * 被禁止的关键字检测 * * @param string $string 要检测的字符串 * @param string $fileName 屏蔽关键字文件 * @return bool */ function banwordCheck( $string, $fileName ) { if ( !($words = file_get_contents( $fileName )) ){ die('file read error!'); } $string = strtolower($string); $matched = preg_match('/'.$words.'/i', $string, $result); if ( $matched && isset($result[0]) && strlen($result[0]) > 0 )  {   if ( strlen($result[0]) == 2 ){    $matched = preg_match('/'.$words.'/iu', $string, $result);   }    if ( $matched && isset($result[0]) && strlen($result[0]) > 0 ) {    return true;   }else{    return false;   }    }else{   return false;  } } $content = '测试关键字'; if ( banwordCheck($content, './banwords.txt') ){  echo "matched! "; }else{  echo "no match! "; }

/* Use strpos function to filter keywords in PHP */

// Remove white space $content = trim($content);

//Read keyword text

$content = @file_get_contents('keyWords.txt'); //Convert to array $arr = explode("n", $content); // Traversal detection for($i=0,$k=count($arr);$i<$k;$i++){ // If this array element is empty, skip this loop if($arr[$i]==''){ continue; } // If a keyword is detected, return the matching keyword and terminate the operation if(@strpos($str,trim($arr[$i]))!==false){ //$i=$k; return $arr[$i];

}

}