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Block numbers in usernames at registration

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Block numbers in usernames at registration

Post by Ange Tuteur on July 21st 2014, 10:40 am

Block numbers in usernames at registration

This tutorial will allow you to prevent usernames that contain numbers at registration, as in the example below.

Setting up

Go to Administration Panel > Modules > JavaScript Codes management and create a new script.

Title : Your choice
Placement : In all the pages
location.pathname=="/register" &&"?agreed=true&step=2" && $(function(){
 var username_format = /^[^0-9]*$/;
 var format_notice = "Numbers are not allowed in usernames";
 var f = $('form[action=""][method="post"]');
 var p = $('#username_reg');
 var i = $('<span id="username_issue" />').html('<br/>'+format_notice).css({ "color":"red", "font-style":"italic", "display":"none"}).appendTo(p.parent());
 var u = function() {
  if (username_format.test(p.val())) i.hide();
  else {;
  return false;
 p.on('change keyup', function(){ u() });
 $('input[type="reset"]', f).click(function(){ u() });
 $('input[type="submit"]', f).click(u);


The script uses a regular expres​sion( /^[^0-9]*$/ ) to detect if the username contains a digit.

Here are a few websites with tutorials on regular expressions :

And some examples that could take the place of /^[^0-9]*$/ :

Only allow usernames that contain digits :

Only allow usernames that contain 0 or 1 :

Only allow usernames that contain 3 words of 3-10 characters ( without a number ) :

Don't allow usernames that contain special characters :

Ange Tuteur

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Reputation : 2884
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