Which PHP functions are used to convert string to lowercase and uppercase? - PHP MCQs

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Q. Which PHP functions are used to convert string to lowercase and uppercase?

(A) strupper() and strlower()

(B) str_toupper() and str_tolower()

(C) toupper() and tolower()

(D) strtoupper() and strtolower()

Correct answer: Option(D)

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