📊 PHP
Q. Which function checks if a variable is NULL?
  • (A) is_null()
  • (B) isempty()
  • (C) empty()
  • (D) check_null()
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✅ Correct Answer: (A) is_null()

Explanation: is_null() returns true if the variable is NULL.

Explanation by: Rati Dubey
is_null() returns true if the variable is NULL.

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