The original intention of the design is: article list page. If you use strip_tags to delete all styles, the article introduction on the homepage will look messy and have no style. If you simply use strip_tags to retain p or br, then p or br will be truncated when you intercept the string.
The design idea is: keep p and br, then replace p with br; then use br as the separator to separate the entire article.
The specific code is as follows: you can use it directly
/** * 长文章分段 * @param string $article 文章内容 * @param number $return_number 文章字节限制 * @return array */ private function ContentAddpage($content,$return_number=800){ $return_content = ""; //返回的字符串 $current_num = 0; //当前字符串长度 $return_content_num = 0; //上次字符串截取后的长度;用来处理最后数组中字数过长的case. $page_num_word = array();//以br为分隔符使用preg_split分隔字符串生成的数组; $content = strip_tags($content,'<p>,<br>'); $content = preg_replace("/<p(.*?)>/m", "<br>", $content); $content = str_replace("</p>","", $content); $content = preg_replace("/<br(.*?)>/m", "<br>", $content); $content_info = preg_split("/\<br\>/",$content);//根据字符串确定段落 $art_num = count($content_info);//确定段落数 for($i=0;$i <= $art_num-1;$i++){ $page_num_word[$i] = strlen($content_info[$i]); $current_num += $page_num_word[$i];//得到字数 if ($current_num <= $return_number){ $tmp_num = $return_number-$current_num; $return_content .= mb_substr($content_info[$i],0,$tmp_num)."<br>"; $return_content_num = $current_num; }else{ $tmp_num = $return_number-$return_content_num; $return_content .= mb_substr($content_info[$i],0,$tmp_num)."<br>"; break; } } return $return_content; }

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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