阐述了在超文本传输协议 (HTTP)中实现会话的必要性 ,分析并解决了在实现过程中遇到的几个关键问题 ;系统地描述了HTTP中会话的工作机制 ,给出了在HTTP中实现会话的若干方法及基于PHP的实现代码 ,并对比了各种方法的优缺点。这些方法对实现Web服务器集群中共享会话数据 ,将同一会话的Web请求重定向到相同的Web服务器上 ,给出了技术上实现的可能性。对Internet应用的安全起到了一定的作用 Expounds the necessity of realizing the conversation in Hypertext Transfer Protocol (HTTP), analyzes and solves several key problems encountered in the implementation process, systematically describes the working mechanism of the conversation in HTTP, Several ways to achieve the conversation and PHP-based implementation code, and compared the advantages and disadvantages of various methods. These methods provide the technical realization possibilities for sharing session data in a Web server cluster and redirecting Web requests for the same session to the same Web server. Internet application security has played a role