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May 20, 2021 · Backend Development
How to Resolve the ThinkPHP Multi‑App “Index Class Not Found” Error
This guide explains why the ThinkPHP controller Index class may not be found in a multi‑app setup, lists common causes, and provides three step‑by‑step solutions—including installing the think‑multi‑app extension, adjusting configuration files, and using full‑path URLs—along with the necessary code changes.
BackendConfigurationError Handling
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