前几天写一个程序的时候,有一个脚本的执行时间比较长,100s+,但是php.ini默认的脚本超时时间是30s,所以自然而然的中断了,加上set_limit_time(0),发现函数被禁用了,汗。
到论坛问客服,客服说因为是共享服务器,为了避免某一个虚拟机内的脚本有死循环,使CPU飙升,就关闭了这个函数,听到这个结果,我异常蛋疼。
在蛋疼了一天以后,有个会员给提供了一个方法,利用htacces修改脚本超时时间等php.ini参数。试了一下,嘿,还真可以,又忽然想到了ini_set()这个函数,试了一下,依然可以,哇嘎嘎,我可以邪恶了~
实例:
# 先以htaccess为例 # 示例: # php_value 参数名 参数值 # 实例: php_value max_execution_time 600 # 这样,脚本超时时间就改为了600(十分钟)了
这是.htaccess的写法,不过貌似这样写之后,rewrite都失效了?反正我同目录下的dz伪静态没用,一直404,汗,方便没好货啊,不过如果禁用了ini_get和ini_set,这个方法还是可取的。
下面看php的:
<?php echo "修改前:".ini_get("max_execution_time"); if(ini_set("max_execution_time",600)) echo "修改ing..."; else exit("ini_set()函数被禁用"); sleep(3); echo "修改后:".ini_get("max_execution_time"); ?>
刚才忘了,最后加一句:htaccess那个只能用于 PHP_INI_ALL 或 PHP_INI_PERDIR 类型的指令,其它的不行。

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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