We Keep Coding

HTML Form Validation - Check for Specific Characters

I'm using the Html5 pattern to validate my inputs on forms. I need to make sure an input has the following rules:
A maximum and minimum of 8 characters
The first 3 must be the specific letters wrx (lowercase)
The last 5 must be numbers.
Eg. wrx12345
Can I even do this with pattern or do I need to use JavaScript?

I believe the regex pattern you are looking for is /^wrx[0-9]{5}$/. A visual representation of this here:
And implemented in html:
<input name="example" pattern="^wrx[0-9]{5}$">

You can use regex in Javascript with this regex:
"/[wrz][\d]{5}/g".
To test the minimum = maximum length = 8, you can just test it in javascript.
If the length egual 8, use the regex
Else, show error
I think this could work

You don't need Javascript to do this.
The pattern attribute uses regular expressions so you can use something like this: ^wrx[0-9]{5}$
The ^ and $ indicates the start and end of the string. Then 'wrx' has to be matched exactly and [0-9]{5} looks for 5 number bewteen 0-9.
You can use something like RegExr to test your patterns.

How can I match bangladeshi phone number using RegExp in javascript?

this following expression is working for any 11 digits phone number. But I want the first three digit to be specific operator code like (017, 016, 018, 019). And rest of the others can be any digits.
/^([\d]{3})*([\d]{8})$/

You may use an alternation here:
/^(01[6789])(\d{8})$/
Code sample:
console.log(/^(01[6789])(\d{8})$/.test('01612345678')); // pass
console.log(/^(01[6789])(\d{8})$/.test('01912345678')); // pass
console.log(/^(01[6789])(\d{8})$/.test('12312345678')); // fail

Regex Comma Separated Phone Number

I am trying to generate a regex which would match the following sequence-
+91123456789,+41123456789,+21123456789.... and so on, there is no limit of phone numbers.
Basically the usage is to validate the phone numbers which users may add, phone number can be multiple and need to be separated by commas, I am already removing the empty spaces which users may add, so no worry for that.
I am not good with regex and have created the following regex but it doesn't matches the preceding phone numbers, means the whole string of phone numbers do not match-
^\+?\d{1,4}?[-.\s]?\(?\d{1,3}?\)?[-.\s]?\d{1,4}[-.\s]?\d{1,4}[-.\s]?\d{1,9},\+?\d{1,4}?[-.\s]?\(?\d{1,3}?\)?[-.\s]?\d{1,4}[-.\s]?\d{1,4}[-.\s]?\d{1,9}$
I need to validate the user input using javascript or jquery.
Valid Phone number should be having country code like +91 or +21 etc country code can be of one or two digits, then the number of digits need to be 7 to 9.
I anyone could help, it would be highly appreciable, I have spent lot of time on this one.

To validate the whole string handling mulitple values sepparated by comma just add an group with * multiplier:
^\+\d{8,11}(,\+\d{8,11})*$

If I understand the requirements correctly, the following regex should work
\+\d{9,11}
However, you can separate the country code out, for if you need to allow for (+44)xxxxxxxxx
\+\d{2}\d{7,9}
if the requirement is to allow for 1 country code as well, adjust the regex to the following
\+\d{1,2}\d{7,10} //I think to 10, not sure on their numbers
You can update the ranges as you see fit :)
Demo: https://regex101.com/r/rJ4wM7/1

Phone number formatting validation

How would I validate with Javascript/jQuery that a phone number matches the format of +322123456?
The +32 is mandatory, and the phone number begins with it.
After the +32, 8 or 9 numbers

Use regex to do that.
/\+32\d{8,9}/

try
\+32\d{8,9}
DEMO

You use this regex : \+32[0-9]{8}[0-9]+ to check that.

Need regex to match unformatted phone number syntax

I need a regex for Javascript that will match a phone number stripped of all characters except numbers and 'x' (for extension). Here are some example formats:
12223334444
2223334444
2223334444x5555
You are guaranteed to always have a minimum of 10 numerical digits, as the leading '1' and extension are optional. There is also no limit on the number of numerical digits that may appear after the 'x'. I want the numbers to be split into the following backreferences:
(1)(222)(333)(4444)x(5555)
The parenthesis above demonstrate how I want the number to be split up into backreferences. The first set of parenthesis would be assigned to backreference $1, for example.
So far, here is what I've come up with for a regex. Keep in mind that I'm not really that great with regex, and regexlib.com hasn't really helped me out in this department.
(\d{3})(\d{3})(\d{4})
The above regex handles the 2nd case in my list of example test cases in my first code snippet above. However, this regex needs to be modified to handle both the optional '1' and extension. Any help on this? Thanks!

Regex option seems perfectly fine to me.
var subject = '2223334444';
result = subject.replace(/^1?(\d{3})(\d{3})(\d{4})(x\d+)?$/mg, "1$1$2$3$4");
alert(result);
if(!result.match(/^\d{11}(?:x\d+)?/))
alert('The phone number came out invalid. Perhaps it was entered incorrectly');
This will say 12223334444 when there is no extension
I expect you want to tweak this out some, let me know how it should be.

If I were you, I would not go with a regular expression for this — it would cause more headaches than it solved. I would:
Split the phone number on the "x", store the last part in the extension.
See how long the initial part is, 9 or 10 digits
If it's 10 digits, check that the first is a 1, slice it off, and then continue with the 9-digit process:
If it's 9 digits, split it up into 3-3-4 and split them into area code, exchange, number.
Validate the area code and exchange code according to the rules of the NANP.
This will validate your phone number and be much, much easier and will make it possible for you to enforce rules like "no X11 area codes" or "no X11 exchange codes" more-easily — you'd have to do this anyway, and it's probably easier to just use plain string manipulation to split it into substrings.

I did a bit more testing and here's a solution I've found. I haven't found a case where this breaks yet, but if someone sees something wrong with it please let me know:
(1)?(\d{3})(\d{3})(\d{4})(?:x(\d+))?
Update:
I've revised the regex above to handle some more edge cases. This new version will fail completely if something unexpected is present.
(^1|^)(\d{3})(\d{3})(\d{4})($|(?:x(\d+))$)

My regex is:
/\+?[0-9\-\ \(\)]{10,22}/g