What is include_once() in PHP ??

Question

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Answer 1

The include_once statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include statement, with the only difference being that if the code from a file has already been included, it will not be included again, and include_oncereturns TRUE .

Answer 2

it prevents us from loading over and over again the same file if its needed only once...