How to check if string has at least one letter, number and special character in php

Question

I am currently writing a small script that checks the contents of each string.

I was wondering what the REGEX would be to make sure that a string has a letter (upper

Answer 1

A letter is \pL, a number is \pN and a special char is [what you want], here I assume it is not a letter and not a number, so the regex looks like:

/^(?=.*?\pL)(?=.*?\pN)(?=.*[^\pL\pN])/