must revalidate

The code for disabling page caching in php is quite simple. You only need to use the php header () browser to send a Cache-Control: no-cache or set the page Cache expiration time before today. Some friends said that the following is the simplest way

There are many kinds of caches: Server cache, third-party cache, browser cache, and so on. The browser cache is the least expensive, because the browser cache relies on the client and consumes little server-side resources.Making the browser cache

pragma and No-cacheUsed to define the page cache and not cache pages (to speed up some browsers will cache the pages viewed by the viewer, as defined below, browsers generally do not cache pages, and browsers cannot browse offline.)Its function is

How to keep the information that has been filled in when the PHP submission form fails.How to keep the information after the failure of the PHP submission form Some summary of the methods, the most commonly used is the use of caching, this method if

The return content disappears after the form submits an error how to do, today to analyze and solve this problem. Status Overview: When you fill out a form information submission, you will encounter a problem is when the user fills out and submits

Having the browser do the caching requires sending a specified HTTP header to the browser, telling the browser how long the cache is cached, or not caching it. As a. NET programmer, we have always used this method, in the outputcache instructions to

In the development process, often appear the form error and return the page when the information is all lost, in order to support page bounce, you can use the following two ways to achieve. 1. Use header header to set cache control header

5.8.3 Avoid duplicate submissions of forms It is a tricky problem for users to submit a form because of the speed of the network, or if the webpage is maliciously flushed, causing the same record to be repeatedly inserted into the database. We can

Using the PHPheader () function to implement the 404 error prompt function on the page, we have sorted out the detailed usage of the PHPheader () function and shared it with you. We need a lot of support. If you are just learning PHP, many functions

original articles, reproduced please specify: reproduced from the electric Shang Sharong ec-shalom.com, specialized in electric business.The concept of caching has not been clear, resulting in the use of PHP write cache is also very not

Php session Principle Session is a way to maintain user session data on the server side. The corresponding cookie is to maintain user data on the client side. HTTP is a stateless protocol. After the server responds, it loses its connection with the

Write the phpWML code. now we write the first PHPWML page named index. wml & lt ;? PhpHeader (& quot; Content-type: textvnd. wap. wml & quot;); Header (& quot; Cache-Control: no-cache, must-revalidate & quot;); Hea write php/WML code Now let's

Two methods for PHP to support page rollback: [convert]. During the development process, the information filled in when the page is returned due to a form error is often lost. to support page jump, you can use two methods. First, when the Header

During the development process, the information filled in when the page is returned due to a form error is often lost. to support page jump, you can use two methods. First, use the Header method to set the message Header

This article describes how to retain the information that has been filled in after PHP fails to submit the form. For more information, see This article describes how to retain the information that has been filled in after PHP fails to submit the

This article mainly introduces how to solve the problem of the disappearance of returned content after the form is submitted incorrectly. For more information, see This article mainly introduces how to solve the problem of the disappearance of

The following describes how to use the header function. No matter how many headers are on the page, the function executes the last one, but it is conditional. For example: header (Location: www.jb51.net); header (Location: www.g.cn); header

If you have just started learning PHP, there may be many functions that need to be studied. Today we will learn how to use PHP Header (). For more instructions, please refer to the PHP Chinese manual. The following describes how to use the header

During the development process, the information filled in when the page is returned due to a form error is often lost. To support page Jump, you can use two methods.First, use the Header method to set the message Header Cache-controlHeader

Header (& amp; quot; Pragma: public & amp; quot;); header (& amp; quot; Cache-control: max-age & amp; quot ;. $ expire); header (& #039; Cache-Control: no-store, no-cache, must-revalidate & #039;); header (& amp; quot; Expires: & amp; quot ;. gmdate