Linux Apps Tutorials - Herong's Tutorial Examples - v1.02, by Herong Yang
Files Used in PHP "include" Statements
This section provides a tutorial example on how to the PHP engine search for files given in the 'include' statements.
When you use the "include" statement to execute script stored in a separate file, the PHP engine uses the following rules to search and find the script file.
1. If an absolute path is given together with the file name, the PHP engine will search for the file in the directory of the given absolute path only. For example, the following code will search for include_extra.php in /usr/share/php directory only.
<?php include "/usr/share/php/include_extra.php"; ?>
2. If a relative path is given together with the file name, the PHP engine will search for the file in the directory of the given path relative to the current working directory, which may not be the same as the directory of the calling script is located. For example, the following code will search for include_extra.php in the same directory where the code is executed.
<?php include "./include_extra.php"; ?>
3. If no path is given together with the file name, the PHP engine will search for the file in the following 3 locations sequentially:
For example, the following code will search for include_extra.php in multiple places.
<?php include "include_extra.php"; ?>
So the best way to use the "include" statement is to give the file name only and make sure the included files are stored in one of the "include_path" directory.
Table of Contents
Running Apache Web Server (httpd) on Linux Systems
►Running PHP Scripts on Linux Systems
Install and Manage PHP Packages on CentOS
"php -i" - Dump PHP Environment Information
Install and Manage PHP Modules on CentOS
►Files Used in PHP "include" Statements
Publish PHP Scripts on Apache Web Server
Dump PHP/Apache Environment Information
Change PHP Configuration Settings
Apache PHP file_put_contents() Permission Denied
SELinux Security Context on /var/www/html
Migrate Old Scripts to New PHP Release
Running MySQL Database Server on Linux Systems
Running Python Scripts on Linux Systems
Conda - Environment and Package Manager