php ini include_path

The path to which this parameter is set serves as the base path used by functions such as include(), require(), and fopen_with_path(). You can specify multiple directories by separating each with a semicolon, as shown in the following example:

include_path = ".:/usr/local/include/php;/home/php"

By default, this parameter is set to the path defined by the environment variable PHP_INCLUDE_PATH.

include_path = ".;C:\php6\includes"

Note : that on Windows, backward slashes are used in lieu of forward slashes, and the drive letter prefaces the path: