require_once

(PHP 4, PHP 5, PHP 7)

The require_once statement is identical to require except PHP will check if the file has already been included, and if so, not include (require) it again.

See the include_once documentation for information about the _once behaviour, and how it differs from its non _once siblings.

← include

include_once →

Licensed under the Creative Commons Attribution License v3.0 or later.

https://secure.php.net/manual/en/function.require-once.php