PHP: set_include_path

Description

string set_include_path ( string new_include_path )

Sets the include_path configuration option for the duration of the script. Returns the old include_path on success or FALSE on failure.

Example 1. set_include_path() example

<?php // Works as of PHP 4.3.0 set_include_path('/inc'); // Works in all PHP versions ini_set('include_path', '/inc'); ?>

Example 2. Adding to the include path
Making use of the PATH_SEPARATOR constant, it is possible to extend the include path regardless of the operating system.
In this example we add /usr/lib/pear to the end of the existing include_path.

<?php $path = '/usr/lib/pear'; set_include_path(get_include_path() . PATH_SEPARATOR . $path); ?>

User Contributed Notes
set_include_path

junya at xs4all dot nl
28-Jan-2005 07:41


When you use .htaccess to set the include path, don't forget Apache directive 'AllowOverride Options' or 'AllowOverride All' is also needed.

df a t dougfelton d o t c o m
25-Jan-2005 09:37


In order to use .htaccess files to set the include path, PHP must be installed as an Apache module. If PHP is compiled as a CGI binary, you can set the include path in a custom php.ini file (if, for example, you're being hosted somewhere and don't have access to the main php.ini file.  Note that custom php.ini files don't affect subdirectories in the way that .htaccess files do, so you'll need to put your custom php.ini file in any subdirectories as well.

Robin Millette at http://rym dot waglo dot com/
13-Dec-2004 08:54


Since the path separator is platform dependant, PHP provides the PATH_SEPARATOR magic constant, showing up as a colon ( : ) on this GNU/Linux machine.

r dot s dot goldsmith at far-blue dot co dot uk
08-Dec-2004 05:23


If you want to set the paths php uses to find included files on a directory by directory level, you can do so in Apache's .htaccess file. Add the line:



php_value include_path  "<first path to look>:<second path>:<etc>:."



to the .htaccess file. This will replace any paths set in your environment or the php.ini file so remember to include the path to php's own libraries as, usually, the first option!



V.useful tip given to me by the 'php guy' at Edinburgh Uni's Computing Support.