Two functions to help:
<?php
function add_include_path ($path)
{
foreach (func_get_args() AS $path)
{
if (!file_exists($path) OR (file_exists($path) && filetype($path) !== 'dir'))
{
trigger_error("Include path '{$path}' not exists", E_USER_WARNING);
continue;
}
$paths = explode(PATH_SEPARATOR, get_include_path());
if (array_search($path, $paths) === false)
array_push($paths, $path);
set_include_path(implode(PATH_SEPARATOR, $paths));
}
}
function remove_include_path ($path)
{
foreach (func_get_args() AS $path)
{
$paths = explode(PATH_SEPARATOR, get_include_path());
if (($k = array_search($path, $paths)) !== false)
unset($paths[$k]);
else
continue;
if (!count($paths))
{
trigger_error("Include path '{$path}' can not be removed because it is the only", E_USER_NOTICE);
continue;
}
set_include_path(implode(PATH_SEPARATOR, $paths));
}
}
?>
get_include_path
(PHP 4 >= 4.3.0, PHP 5)
get_include_path — Gets the current include_path configuration option
Description
string get_include_path
( void
)
Gets the current include_path configuration option value.
Return Values
Returns the path, as a string.
Examples
Example #1 get_include_path() example
<?php
// Works as of PHP 4.3.0
echo get_include_path();
// Works in all PHP versions
echo ini_get('include_path');
?>
See Also
- ini_get() - Gets the value of a configuration option
- restore_include_path() - Restores the value of the include_path configuration option
- set_include_path() - Sets the include_path configuration option
- include - include

ricardo dot ferro at gmail dot com ¶
4 years ago
Borszczuk ¶
7 years ago
In case you would like to have all include path elements in form of an array use the following code (PATH_SEPARATOR is PHP's constand and it's crucial to avoid problems with different linux/windows separators
<?php
$pathArray = explode( PATH_SEPARATOR, get_include_path() );
print_r( $pathArray );
?>