get_include_path() returns the value of the
include path which is a list of directories, separated by a colon (
:), that are searched for files when files are included.
Suppress error messages
The following snippet uses the
error control operator (@) to suppress error messages when
include_once() does not find the requested file.
Additionally, the return value of include_once() is tested for success. If it returns false, the script is bailed out.
if (! @include_once("funcs.php")) {
header('Content-Type: text/plain');
print("Where is funcs.php?");
exit(-1);
}