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Which function is used to determine whether the variable’s value is either TRUE or FALSE?

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Which function is used to determine whether the variable’s value is either TRUE or FALSE?

(a) boolean()

(b) is_boolean()

(c) bool()

(d) is_bool()

The question was posed to me during an interview for a job.

The origin of the question is Object Basics-1 in chapter Objects and Databases in PHP of PHP

1 Answer

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Best answer
The correct answer is (d) is_bool()

Best explanation: None.

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