Sanjana
Joined: 02 Feb 2009
Posts: 48
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 Posted: Mon Jul 19, 2010 7:26 am Post subject: Difference between include,require and require_once |
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Hi friends,
Difference between require() and require_once():
require() includes and run a specific file, while require_once() does that only if it has not been included before on the same page.
So, require_once() is recommended to use when you want to include a file where you have a lot of functions for example. This way you make sure you don’t include the file more times and you will not get the “function re-declared” error.
Difference between require() and include() is that require() produces a FATAL ERROR if the file you want to include is not found, while include() only produces a WARNING.
There is also include_once() which is the same as include(), but the difference between them is the same as the difference between require() and require_once() |
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