In order to use CometChat mobile app with your website, you need to make sure that you are using CometChat version 5.0.0+

Also, refer to the following steps for troubleshooting any login issues:

1. If you have white labelled CometChat on your web site, then please use http://<your site URL>/<white labelled name for cometchat>/ as URL.

for example: http://www.mysite.com/
mywhitelabelledcometchat/

2. If you are getting an error message “Username and password do not match” then please make sure you have configured chatLogin function correctly.

This function takes username/email and password as input and returns encrypted userID (primary key of your site’s users table) after authenticating user based on your authentication mechanism.

For example:

function chatLogin($userName, $userPass) {

    $userid = 0;
    if (filter_var($userName, FILTER_VALIDATE_EMAIL)) {
        $sql = ("SELECT * FROM `".TABLE_PREFIX.DB_USERTABLE.
            "` WHERE email ='".$userName.
            "'");
    } else {
        $sql = ("SELECT * FROM `".TABLE_PREFIX.DB_USERTABLE.
            "` WHERE username ='".$userName.
            "'");
    }
    $result = mysqli_query($GLOBALS['dbh'], $sql);
    $row = mysqli_fetch_assoc($result);
    $salted_password = md5($row1['value'].$userPass.$row['salt']);
    if ($row['password'] == $salted_password) {
        $userid = $row['user_id'];
        if (isset($_REQUEST['callbackfn']) && $_REQUEST['callbackfn'] == 'mobileapp') {
            $sql = ("insert into cometchat_status (userid,isdevice) values ('".mysqli_real_escape_string($GLOBALS['dbh'], $userid).
                "','1') on duplicate key update isdevice = '1'");
            mysqli_query($GLOBALS['dbh'], $sql);
        }
    }
    if ($userid && function_exists('mcrypt_encrypt') && defined('ENCRYPT_USERID') && ENCRYPT_USERID == '1') {
        $key = "";
        if (defined('KEY_A') && defined('KEY_B') && defined('KEY_C')) {
            $key = KEY_A.KEY_B.KEY_C;
        }
        $userid = rawurlencode(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $userid, MCRYPT_MODE_CBC, md5(md5($key)))));
    }

    return $userid;
}

3. Please make sure you have added the following code in getUserID function after $userid=0; like:

function getUserID() {
    $userid = 0;
    if (!empty($_SESSION['basedata']) && $_SESSION['basedata'] != 'null') {
        $_REQUEST['basedata'] = $_SESSION['basedata'];
    }

    if (!empty($_REQUEST['basedata'])) {

        if (function_exists('mcrypt_encrypt') && defined('ENCRYPT_USERID') && ENCRYPT_USERID == '1') {
            $key = "";
            if (defined('KEY_A') && defined('KEY_B') && defined('KEY_C')) {
                $key = KEY_A.KEY_B.KEY_C;
            }
            $uid = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode(rawurldecode($_REQUEST['basedata'])), MCRYPT_MODE_CBC, md5(md5($key))), "");
            if (intval($uid) > 0) {
                $userid = $uid;
            }
        } else {
            $userid = $_REQUEST['basedata'];
        }
    }
    if (!empty($_SESSION['userid'])) {
        $userid = $_SESSION['userid'];
    }

    $userid = intval($userid);
    return $userid;
}