Laravel Password validation Regex (Contain at least one uppercase/lowercase letters and one number)

passwordValidation.php

<?php
/*
* Place this with the rest of your rules.
* Doesn't need to be in an array as there are no pipes.
* Password is required with a minimum of 6 characters
* Should have at least 1 lowercase AND 1 uppercase AND 1 number
*/
$rules = [
    'password' => 'required|min:6|regex:/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).+$/'
];

/*
* Use this one if you also require at least one symbol.
* Needs to be in an array as it contains a pipe symbol.
* Password is required with a minimum of 6 characters
* Should have at least 1 lowercase AND 1 uppercase AND 1 number AND 1 symbol
*/
$rules = [
    'password' => [
        'required',
        'min:6',
        'regex:/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*(_|[^\w])).+$/'
    ]
];