Require_once need to be aware of the problem and set the include path

Set up common Files to include: (Under Project root)

include.php

<?php    Header ("Content-type:text/html;charset=utf-8");    Date_default_timezone_get ("PRC");    Session_Start ();    _file_ returns the full (absolute) path of the file where the current code resides (rather than the URL)    //dirname ($file _name) returns the $file_name layer directory name    define ("ROOT", DirName ( FILE));    Set_include_path ("."). Path_separator. ROOT. " /core ". Path_separator. ROOT. " /configs ". Path_separator.get_include_path ());    Require_once ' mysql.func.php ';    Require_once ' image.func.php ';    Require_once ' common.func.php ';    Require_once ' string.func.php ';    Require_once ' page.func.php ';    Require_once ' configs.php ';    Require_once ' admin.inc.php ';    Require_once ' cate.inc.php ';    Require_once ' pro.inc.php ';    Require_once ' album.inc.php ';    Require_once ' user.inc.php ';    Require_once ' upload.func.php ';    Connect ();? >

Then, the other pages directly require_once ('./include.php ')//path relative to include.php

However, there is a problem with file nesting

Here is a detailed explanation of the specific

Click to open link

So, for the sake of insurance, it's best

Require_once (DirName (FILE). ' /'.'.. /include.php ');

and start with DirName (FILE). ' /'