How to Create a Random Username Generator with Vanilla PHP

In this tutorial, we’ll build a Username Generator using PHP.
Generate random, fun, or professional usernames for your users — perfect for login systems, games, or any web app.

💡 Fully customizable — add your own prefixes, numbers, or styles!

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PHP Script:
function generateRandomString($length = 5)
{
return substr(str_shuffle("abcdefghijkmnpqrstuvwxyz23456789"), 0, $length);
}