set_include_path
PHP function
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(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
Sets the include_path configuration option
Description
set_include_path(string $include_path): string|false
Sets the include_path configuration option for the duration of the script.
Parameters
include_pathThe new value for the include_path
Return Values
Returns the old include_path on successFalseforfailure.
Examples
set_include_path() example
php
<?php
set_include_path('/usr/lib/pear');
// Or using ini_set()
ini_set('include_path', '/usr/lib/pear');
?>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
<?php
$path = '/usr/lib/pear';
set_include_path(get_include_path() . PATH_SEPARATOR . $path);
?>