Solve PHP relative directory problem_PHP tutorial

When using include or require to include a file, add dirname(__file__) before the file path. For example: There are currently four files a.php, b.php, c.php, and d.php. Their relationship is:

b.php (same level as the root directory)
Root directory/a. php
Root directory/c.php
Root directory/dir/d.php

Now a.php should contain b.php and c.php. The writing method is as follows:

include_once(dirname(__file__)."/../b.php");
include_once(dirname(__file__)."/c.php");
?>

include_once(dirname(__file__)."/../b.php");
include_once(dirname(__file__)."/c.php");

include_once(dirname(__file__)."/dir/d.php");
?>

?> If c.php contains d.php. The writing method is as follows:

include_once(dirname(__file__)."/dir/d.php");

?>

This method is currently The most effective way to solve path misalignment http://www.bkjia.com/PHPjc/371453.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/371453.htmlTechArticleWhen using include or require to include a file, add dirname (__file__) before the file path. For example: There are currently four files a.php, b.php, c.php, and d.php. Their relationship is: b.php (same as the root directory...