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

复制代码

/* 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

复制代码

/** * 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];

}

}

// Return false if no keyword is detected

return false;

} <🎜> $content = 'Here is the text content to be published. . . '; <🎜> // Filter keywords<🎜> $keyWord = keyWordCheck($content);<🎜> // Determine whether the keyword exists <🎜> if($keyWord){<🎜> echo 'The content you posted contains keywords'.$keyWord;<🎜> }else{<🎜> echo 'Congratulations! By keyword detection';<🎜> // Next, you can perform the library writing operation to complete the publishing action. <🎜> }<🎜> <🎜> <🎜> <🎜> <🎜>Example 2 (Note: The keyword file used in Chinese keyword filtering is utf-8 encoded<🎜>

The code is as follows<🎜>

Copy code<🎜> <🎜>

<🎜><🎜> /**<🎜> * Banned keyword detection<🎜> *<🎜> * @param string $string The string to be detected <🎜> * @param string $fileName Mask keyword file<🎜> * @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; } } $content = 'Test keyword'; if ( banwordCheck($content, './banwords.txt') ){ echo "matched! "; }else{ echo "no match! "; } http://www.bkjia.com/PHPjc/629632.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/629632.htmlTechArticleWe often find that where we submit a reservation, there will be a lot of advertising, and later we want to make one I have searched for several methods to introduce the function of blocking and filtering specified keywords... Statement of this Website The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn Hot AI Tools Undresser.AI Undress AI-powered app for creating realistic nude photos AI Clothes Remover Online AI tool for removing clothes from photos. Undress AI Tool Undress images for free Clothoff.io AI clothes remover Video Face Swap Swap faces in any video effortlessly with our completely free AI face swap tool! Show More Hot Article How to fix KB5055523 fails to install in Windows 11? 3 weeks ago By DDD How to fix KB5055518 fails to install in Windows 10? 3 weeks ago By DDD Roblox: Dead Rails - How To Tame Wolves 1 months ago By DDD Strength Levels for Every Enemy & Monster in R.E.P.O. 1 months ago By 尊渡假赌尊渡假赌尊渡假赌 Roblox: Grow A Garden - Complete Mutation Guide 2 weeks ago By DDD Show More Hot Tools Notepad++7.3.1 Easy-to-use and free code editor SublimeText3 Chinese version Chinese version, very easy to use Zend Studio 13.0.1 Powerful PHP integrated development environment Dreamweaver CS6 Visual web development tools SublimeText3 Mac version God-level code editing software (SublimeText3) Show More Hot Topics Java Tutorial 1662 14 CakePHP Tutorial 1419 52 Laravel Tutorial 1311 25 PHP Tutorial 1261 29 C# Tutorial 1234 24 Show More Related knowledge How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably, Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead. PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency. PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners. PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved. PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7 See all articles Public welfare online PHP training，Help PHP learners grow quickly！ About us Disclaimer Sitemap © php.cn All rights reserved