Understanding TP5.1 Framework and PHP OpCache Caching Issues
This article explains why changes to PHP code in the TP5.1 framework may require a 30‑second wait before appearing in the browser, revealing that the delay is caused by PHP's OpCache caching mechanism, which must be manually enabled in PHP 5.x but is often enabled by default in PHP 7.x, and provides guidance on diagnosing and resolving the issue.
The article discusses a caching problem encountered when modifying PHP code within the TP5.1 framework, where changes do not appear immediately in the browser and require a waiting period of about 30 seconds.
It explains that the root cause is the PHP OpCache, a bytecode cache that stores compiled scripts to improve performance. In PHP 5.x versions, OpCache must be manually enabled, while many PHP 7.x installations enable it by default.
The author advises developers to check the OpCache settings, clear the cache when necessary, and adjust configuration to ensure that code updates are reflected promptly during development.
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