Function validate_username

Checks if the value does not contain special characters

Package: PHPLucidFrame\Core
Copyright: Copyright (c), PHPLucidFrame.
License: MIT License This source file is subject to the MIT license that is bundled with this source code in the file LICENSE
Author: Sithu sithu@phplucidframe.com
Located at helpers/validation_helper.php

Parameters summary
`mixed`	`$value`	The value being checked

Return value summary
`boolean`	TRUE if the value does not contain special characters, FALSE otherwise