The Zend Page Cache improves PHP application performance by caching the entire output of PHP scripts (HTML, XML, etc.), while still maintaining dynamic capabilities through an elaborate rules system. Page caching extends the concept of caching files and applies it to pages. Caching by page facilitates the ability to eliminate situations where the same file is used in multiple instances, such as when the same file is used to redirect to several pages. Zend Server Page Cache does not require any code changes and can be easily applied to existing applications. Moreover, while other caching solutions still run some code on recurring executions, the cache does not run any code to display the cached content, which results in improved performance.
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