PHP predefined constant __FILE__

Directory structure:

--F:websitewebgisindex.php

Test code: index.php

echo "<br>测试输出__FILE__";
echo "<br>".__FILE__;
echo "<br>".dirname(__FILE__);

Output result:

Test output__FILE__
F:websitewebgisindex.php
F:websitewebgis

Summary: __FILE__ outputs the path of the current file. In the case of include(index.php), the output path is also F:websitewebgisindex.php.

The above introduces the PHP predefined constant __FILE__, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.