require_once(), require(), include()
This is a discussion on require_once(), require(), include() within the PHP Programming forums, part of the Web Development category; What is difference between require_once(), require(), include()?...
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require_once(), require(), include() |
#2
07-16-2007, 06:39 AM
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 Re: require_once(), require(), include() Difference between require() and require_once(): require() includes and evaluates 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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