checking a password for upper lower numbers and symbols

Question

I am using the below script to check my passwords for length, uppercase, lowercase and numbers.

How could I change it to make it check FOR symbols instead of against

Answer 1

Tests if the input consists of 6 or more ASCII characters.The input must contain at least one upper case letter, one lower case letter and one digit.

if(preg_match('/\A(?=[\x20-\x7E]*?[A-Z])(?=[\x20-\x7E]*?[a-z])(?=[\x20-\x7E]*?[0-9])[\x20-\x7E]{6,}\z/' $password))
    echo("valid password");

Answer 2

your desired regex is below

   $pattern = ' ^.*(?=.{7,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*$ ';

   preg_match($pattern,$password);

DEMO

Answer 3

Either you determine a list of valid symbols:

preg_match('`[\$\*\.,+\-=@]`',$password)

or you can look for anything that isn't alnum:

preg_match('`[^0-9a-zA-Z]`',$password)