set_include_path Sets the include_path configuration option &reftitle.description; stringset_include_path stringnew_include_path Sets the include_path configuration option for the duration of the script. &reftitle.parameters; new_include_path The new value for the include_path &reftitle.returnvalues; Returns the old include_path on success&return.falseforfailure;. &reftitle.examples; <function>set_include_path</function> example ]]> 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. ]]> &reftitle.seealso; ini_set get_include_path restore_include_path include