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What is the return type of session_set_save_handler() function?

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What is the return type of session_set_save_handler() function?

(a) boolean

(b) integer

(c) float

(d) character

I got this question in an interview for job.

I want to ask this question from Session Handling-2 topic in section File and Session Handling in PHP of PHP

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Best answer
Correct option is (a) boolean

The best explanation: Returns TRUE on success or FALSE on failure.

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