An error occurred in the form, and all form information is retained when returning to the original page.

The Session_cache_limiter () function in PHP is the buffer control method used to specify the session page.

Grammar:
String Session_cache_limiter ([string cache_limiter])
Cache_limiter the name of the cache limit to set
Returns the name of the cache limit

It should be noted, however, that the Session_cache_limiter () method is only useful until the Session_Start () method is written.

Practical application:

In the development process, often because the form error and return to the page when the information is missing, in order to support page bounce, can be implemented in two ways.

First, use the header method to set the message header Cache-control
Header (' Cache-control:private, must-revalidate ');//Support page Bounce

Second, use the Session_cache_limiter method
Note to write before the Session_Start method
Session_cache_limiter (' Private, must-revalidate ');//Support page Bounce

An error occurred in the form, and all form information is retained when returning to the original page.