How to clear cache in Ajax
This time I will show you how to clear the cache in Ajax, and what are the notes for clearing the cache in Ajax. The following is a practical case, let's take a look.
1. Add anyAjaxObj.setRequestHeader(“If-Modified-Since”,”0″) before sending the ajax request.
2. Add anyAjaxObj.setRequestHeader("Cache-Control","no-cache") before sending the request via ajax.
3. Add a random number after the URL: “fresh=" + Math.random();.
4. Add the time after the URL: "nowtime=" + new Date().getTime();.
5. If you are using jQuery, just do $.ajaxSetup({cache:false}). In this way, all ajax on the page will execute this statement and there is no need to save cache records.
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
Recommended reading:
ajax operation layer occlusion page
Use Ajax to add OA accounts based on human resources system data Methods
The above is the detailed content of How to clear cache in Ajax. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to solve the 403 error encountered by jQuery AJAX request
Feb 20, 2024 am 10:07 AM
Title: Methods and code examples to resolve 403 errors in jQuery AJAX requests. The 403 error refers to a request that the server prohibits access to a resource. This error usually occurs because the request lacks permissions or is rejected by the server. When making jQueryAJAX requests, you sometimes encounter this situation. This article will introduce how to solve this problem and provide code examples. Solution: Check permissions: First ensure that the requested URL address is correct and verify that you have sufficient permissions to access the resource.
How to view and refresh dns cache in Linux
Mar 07, 2024 am 08:43 AM
DNS (DomainNameSystem) is a system used on the Internet to convert domain names into corresponding IP addresses. In Linux systems, DNS caching is a mechanism that stores the mapping relationship between domain names and IP addresses locally, which can increase the speed of domain name resolution and reduce the burden on the DNS server. DNS caching allows the system to quickly retrieve the IP address when subsequently accessing the same domain name without having to issue a query request to the DNS server each time, thereby improving network performance and efficiency. This article will discuss with you how to view and refresh the DNS cache on Linux, as well as related details and sample code. Importance of DNS Caching In Linux systems, DNS caching plays a key role. its existence
How to get variables from PHP method using Ajax?
Mar 09, 2024 pm 05:36 PM
Using Ajax to obtain variables from PHP methods is a common scenario in web development. Through Ajax, the page can be dynamically obtained without refreshing the data. In this article, we will introduce how to use Ajax to get variables from PHP methods, and provide specific code examples. First, we need to write a PHP file to handle the Ajax request and return the required variables. Here is sample code for a simple PHP file getData.php:
APCu Best Practices: Improving the Efficiency of Your Applications
Mar 01, 2024 pm 10:58 PM
Optimizing Cache Size and Cleanup Strategies It is critical to allocate appropriate cache size to APCu. A cache that is too small cannot cache data effectively, while a cache that is too large wastes memory. Generally speaking, setting the cache size to 1/4 to 1/2 of the available memory is a reasonable range. Additionally, having an effective cleanup strategy ensures that stale or invalid data is not kept in the cache. You can use APCu's automatic cleaning feature or implement a custom cleaning mechanism. Sample code: //Set the cache size to 256MB apcu_add("cache_size",268435456); //Clear the cache every 60 minutes apcu_add("cache_ttl",60*60); Enable compression
Caching mechanism and application practice in PHP development
May 09, 2024 pm 01:30 PM
In PHP development, the caching mechanism improves performance by temporarily storing frequently accessed data in memory or disk, thereby reducing the number of database accesses. Cache types mainly include memory, file and database cache. Caching can be implemented in PHP using built-in functions or third-party libraries, such as cache_get() and Memcache. Common practical applications include caching database query results to optimize query performance and caching page output to speed up rendering. The caching mechanism effectively improves website response speed, enhances user experience and reduces server load.
How to save video files from browser cache to local
Feb 23, 2024 pm 06:45 PM
How to Export Browser Cache Videos With the rapid development of the Internet, videos have become an indispensable part of people's daily lives. When browsing the web, we often encounter video content that we want to save or share, but sometimes we cannot find the source of the video files because they may only exist in the browser's cache. So, how do you export videos from your browser cache? This article will introduce you to several common methods. First, we need to clarify a concept, namely browser cache. The browser cache is used by the browser to improve user experience.
Advanced Usage of PHP APCu: Unlocking the Hidden Power
Mar 01, 2024 pm 09:10 PM
PHPAPCu (replacement of php cache) is an opcode cache and data cache module that accelerates PHP applications. Understanding its advanced features is crucial to utilizing its full potential. 1. Batch operation: APCu provides a batch operation method that can process a large number of key-value pairs at the same time. This is useful for large-scale cache clearing or updates. //Get cache keys in batches $values=apcu_fetch(["key1","key2","key3"]); //Clear cache keys in batches apcu_delete(["key1","key2","key3"]);2 .Set cache expiration time: APCu allows you to set an expiration time for cache items so that they automatically expire after a specified time.
The relationship between CPU, memory and cache is explained in detail!
Mar 07, 2024 am 08:30 AM
There is a close interaction between the CPU (central processing unit), memory (random access memory), and cache, which together form a critical component of a computer system. The coordination between them ensures the normal operation and efficient performance of the computer. As the brain of the computer, the CPU is responsible for executing various instructions and data processing; the memory is used to temporarily store data and programs, providing fast read and write access speeds; and the cache plays a buffering role, speeding up data access speed and improving The computer's CPU is the core component of the computer and is responsible for executing various instructions, arithmetic operations, and logical operations. It is called the "brain" of the computer and plays an important role in processing data and performing tasks. Memory is an important storage device in a computer.
