How to write php entry file

First, let’s understand the running process of the framework:

Entry file-> Define constants-> Introduce function library-> Automatically load classes-> Start Framework-> Route Analysis-> Loading Controller-> Return Result

php Getting Started Tutorial"

      
Public function function.php in the framework core directory:
      

      
'.print_r($var,true).'
'; } }
      
Framework core file imooc.php:
      

      

      
Run the project, After accessing the entry file index.php, the browser outputs: ok as expected.
      

      
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