Question

Which of the following function converts a string to all uppercase?

a) upper()

b) uppercase()

c) struppercase()

d) strtoupper()

Answer 1

d) strtoupper()

Description: The strtoupper() is one of the most popular functions of PHP, which is widely used to convert the string into uppercase. It takes a string as a parameter and converts all lowercase English character of that string to uppercase.