PHP 正则表达式匹配替换,导致APACHE停止工作
今天发现,模板引擎里的一段代码,当匹配很多的中文文字时,APACHE会停止工作。
$source = "习近平强调,要深入抓好铸魂育人,认真贯彻全军政治工作会议精神,掌握部队思想动态,有针对性抓好思想教育,
引导官兵坚决听党指挥,争做新一代革命军人。要深入抓好练兵备战,强化当兵打仗、带兵打仗思想,培育战斗精神,
抓好实战化军事训练,不断提高履行使命任务能力。要深入抓好正风肃纪,巩固和深化群众路线教育实践活动成果。";
$source=preg_replace("/([^a-zA-Z0-9_]{1,1})+(copy|fputs|fopen|file_put_contents|fwrite|eval|phpinfo)+( |\()/is", "", $source);
var_dump($source);
这一段正则的意思是什么? 把^去掉好像就可以?应该如何解决,谢谢
------解决思路----------------------
([^a-zA-Z0-9_]{1,1})+ 至少匹配一个除了 a-zA-Z0-9的字符
(copy
------解决思路----------------------
fputs
------解决思路----------------------
fopen
------解决思路----------------------
file_put_contents
------解决思路----------------------
fwrite
------解决思路----------------------
eval
------解决思路----------------------
phpinfo)+ 后面紧接这这些函数中的任意一个
(
------解决思路----------------------
\() 后面紧接着空格或“(”
is 不区分大小写,忽略换行
<br />$source = "习近平强调,要深入抓好铸魂育人,认真贯彻全军政治工作会议精神,掌握部队思想动态,有针对性抓好思想教育,<br />引导官兵坚决听党指挥,争做新一代革命军人。要深入抓好练兵备战,强化当兵打仗、带兵打仗思想,培育战斗精神,<br />抓好实战化军事训练,不断提高履行使命任务能力file_put_contents(。要深入抓好正风肃纪,巩固和深化群众路线教育实践活动成果。";<br /><br />$new=preg_replace("/([^a-zA-Z0-9_]{1,1})+(copy<br><font color='#FF8000'>------解决思路----------------------</font><br>fputs<br><font color='#FF8000'>------解决思路----------------------</font><br>fopen<br><font color='#FF8000'>------解决思路----------------------</font><br>file_put_contents<br><font color='#FF8000'>------解决思路----------------------</font><br>fwrite<br><font color='#FF8000'>------解决思路----------------------</font><br>eval<br><font color='#FF8000'>------解决思路----------------------</font><br>phpinfo)+( <br><font color='#FF8000'>------解决思路----------------------</font><br>\()/is", "", $source);<br /><br />echo $new; //。要深入抓好正风肃纪,巩固和深化群众路线教育实践活动成果。<br />
作用可能是替换掉这些函数copy
------解决思路----------------------
fputs
------解决思路----------------------
fopen
------解决思路----------------------
file_put_contents
------解决思路----------------------
fwrite
------解决思路----------------------
eval
------解决思路----------------------
phpinfo
------解决思路----------------------
wamp能运行
^ 是“除了”某某
[^a-zA-Z0-9_] 这表示 除了 a-zA-Z0-9_ 这些字符集合之外的字符都匹配
看起来,也没什么问题,不知道apache停掉的原因,可以看看apache的日志
------解决思路----------------------
打开错误提示没有? 另外,楼主是怎么知道Apache停止工作的。

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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