Course Introduction：Determining the Most Accurate User IP Address in PHPWhen retrieving a user's IP address using PHP, there are multiple server variables available...
2024-12-15 comment 0 569
Course Introduction：To obtain the user's real IP address, multiple HTTP headers need to be checked first. 1. The function checks the headers such as HTTP_CLIENT_IP, HTTP_X_FORWARDED_FOR, and take the first valid IP; 2. Process multiple comma-separated IPs to verify their legitimacy; 3. If all headers are invalid, use REMOTE_ADDR; 4. For CDN environments such as Cloudflare, HTTP_CF_CONNECTING_IP needs to be processed separately; 5. Note that the header information may be forged and cannot be used for security control. This method is suitable for logging and trend analysis, but cannot guarantee 100% accuracy.
2025-07-22 comment 0 951
Course Introduction：How to Get the Client IP Address in PHP for Reliable User IdentificationWhen tracking user actions on your website, obtaining the client IP...
2024-12-20 comment 0 1319
Course Introduction：Retrieving Client IP Addresses in PHPObtaining the client's IP address is crucial for tracking user activity on your website. PHP provides several...
2024-12-31 comment 0 1090
Course Introduction：Pinging an IP Address Using PHP and Echoing the ResultIn this programming question, a user seeks assistance in creating a PHP function to ping an...
2024-11-06 comment 0 963
Course Elementary 13822
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
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Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13175
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24625
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27484
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
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