Fully end to end encrypted anonymous chat program. Server only stores public key lookup for users and the encrypted messages. No credentials are transfered to the server, but kept in local browser storage. This allows 100% safe chatting. https://safechat.ch
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<?php
/*! @file
@id $Id$
@see @ref apichecknewuser
@page api Server API
@tableofcontents
@section apichecknewuser Check If User Exists
API-call checknewuser.php
Check if a user exists in the server's user table.
@param user user name to check
@return json encoded value:
- 'user name as string', if user does exist
- null, if user does not exist or in case of error
*/
// 1 2 3 4 5 6 7 8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
require_once("usertable.php");
try {
$user = $db->real_escape_string($_REQUEST['user']);
$q = $db->query("select * from user where name='$user';");
if ($q->num_rows==0) {
echo json_encode($_REQUEST['user']);
} else {
echo json_encode(null);
}
} catch (Exception $e) {
echo json_encode(null);
}
?>