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What are the differences between require and include, include_once and require_once?

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What are the differences between require and include, include_once and require_once?
posted Apr 2, 2015 by Vrije Mani Upadhyay

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1 Answer

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require will throw a PHP Fatal Error if the file cannot be loaded. (Execution stops)
VS
include produces a Warning if the file cannot be loaded. (Execution continues)

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

answer Apr 2, 2015 by Kali Mishra
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