Question

[:alpha:] can also be specified as ________

(a) [A-Za-z0-9]

(b) [A-za-z]

(c) [A-z]

(d) [a-z]

I have been asked this question in an interview for job.

This question is from Strings and Regular Expressions in division Strings and Regular Expressions of PHP

Answer 1

The correct option is (b) [A-za-z]

The explanation is: [:alpha:] is nothing but Lowercase and uppercase alphabetical characters.