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50 lines
1.6 KiB
50 lines
1.6 KiB
19 years ago
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<?php
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// $Id: UsernameAvailable.php 6392 2005-10-11 14:38:21Z bmol $
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004-2005 Dokeos S.A.
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Copyright (c) Bart Mollet, Hogeschool Gent
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, 44 rue des palais, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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require_once ('HTML/QuickForm/Rule.php');
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/**
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* QuickForm rule to check if a username is available
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*/
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class HTML_QuickForm_Rule_UsernameAvailable extends HTML_QuickForm_Rule
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{
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/**
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* Function to check if a username is available
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* @see HTML_QuickForm_Rule
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* @param string $username Wanted username
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* @param string $current_username
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* @return boolean True if username is available
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*/
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function validate($username,$current_username = null)
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{
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$user_table = Database::get_main_table(MAIN_USER_TABLE);
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$sql = "SELECT * FROM $user_table WHERE username = '$username'";
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if(!is_null($current_username))
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{
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$sql .= " AND username != '$current_username'";
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}
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$number = mysql_num_rows($res);
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return $number == 0;
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}
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}
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?>
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