Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'<>?,./

pixelbobby picture pixelbobby · Dec 2, 2011 · Viewed 296.9k times · Source

I'm trying to create a Regex test in JavaScript that will test a string to contain any of these characters:

!$%^&*()_+|~-=`{}[]:";'<>?,./

More Info If You're Interested :)

It's for a pretty cool password change application I'm working on. In case you're interested here's the rest of the code.

I have a table that lists password requirements and as end-users types the new password, it will test an array of Regexes and place a checkmark in the corresponding table row if it... checks out :) I just need to add this one in place of the 4th item in the validation array.

var validate = function(password){
    valid = true;

    var validation = [
        RegExp(/[a-z]/).test(password), RegExp(/[A-Z]/).test(password), RegExp(/\d/).test(password), 
        RegExp(/\W|_/).test(password), !RegExp(/\s/).test(password), !RegExp("12345678").test(password), 
        !RegExp($('#txtUsername').val()).test(password), !RegExp("cisco").test(password), 
        !RegExp(/([a-z]|[0-9])\1\1\1/).test(password), (password.length > 7)
    ]

    $.each(validation, function(i){
        if(this)
            $('.form table tr').eq(i+1).attr('class', 'check');
        else{
            $('.form table tr').eq(i+1).attr('class', '');
            valid = false
        }
    });

    return(valid);

}

Yes, there's also corresponding server-side validation!

Answer

Jeff Hillman picture Jeff Hillman · Dec 2, 2011

The regular expression for this is really simple. Just use a character class. The hyphen is a special character in character classes, so it needs to be first:

/[-!$%^&*()_+|~=`{}\[\]:";'<>?,.\/]/

You also need to escape the other regular expression metacharacters.

Edit: The hyphen is special because it can be used to represent a range of characters. This same character class can be simplified with ranges to this:

/[$-/:-?{-~!"^_`\[\]]/

There are three ranges. '$' to '/', ':' to '?', and '{' to '~'. the last string of characters can't be represented more simply with a range: !"^_`[].

Use an ACSII table to find ranges for character classes.