localhost工作,在线不在android工作

Hi I am designing Chat application using this index.php,But localhost working perfertly when I was move to online it's not working.how to know the server port.In client side I am calling this index.php file.

Can any one please help me

index.php

<?php


    require_once("mysql.class.php");


    $dbHost = "xxx";
    $dbUsername = "xxx";
    $dbPassword = "xxxx";
    $dbName = "xxx";


    $db = new MySQL($dbHost,$dbUsername,$dbPassword,$dbName);


    define("FAILED", 0);

    define("SUCCESSFUL", 1);

    define("SIGN_UP_USERNAME_CRASHED", 2);  

    define("ADD_NEW_USERNAME_NOT_FOUND", 2);


    define("TIME_INTERVAL_FOR_USER_STATUS", 60);

    define("USER_APPROVED", 1);
    define("USER_UNAPPROVED", 0);


    $username = (isset($_REQUEST['username']) && count($_REQUEST['username']) > 0) 
                                ? $_REQUEST['username'] 
                                : NULL;
    $password = isset($_REQUEST['password']) ? md5($_REQUEST['password']) : NULL;
    $port = isset($_REQUEST['port']) ? $_REQUEST['port'] : NULL;

    $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : NULL;
    if ($action == "testWebAPI")
    {
        if ($db->testconnection()){
        echo SUCCESSFUL;
        exit;
        }else{
        echo FAILED;
        exit;
        }
    }

    if ($username == NULL || $password == NULL)  
    {
        echo FAILED;
        exit;
    }

    $out = NULL;

    error_log($action."
", 3, "error.log");
    switch($action) 
    {

        case "authenticateUser":


            if ($userId = authenticateUser($db, $username, $password)) 
            {                   



                $sql = "select u.Id, u.username, (NOW()-u.authenticationTime) as authenticateTimeDifference, u.IP, 
                                            f.providerId, f.requestId, f.status, u.port 
                                from friends f
                                left join users u on 
                                            u.Id = if ( f.providerId = ".$userId.", f.requestId, f.providerId ) 
                                where (f.providerId = ".$userId." and f.status=".USER_APPROVED.")  or 
                                             f.requestId = ".$userId." ";



                $sqlmessage = "SELECT m.id, m.fromuid, m.touid, m.sentdt, m.read, m.readdt, m.messagetext, u.username from messages m 
"
        . "left join users u on u.Id = m.fromuid WHERE `touid` = ".$userId." AND `read` = 0 LIMIT 0, 30 ";


                if ($result = $db->query($sql))         
                {
                        $out .= "<data>"; 
                        $out .= "<user userKey='".$userId."' />";
                        while ($row = $db->fetchObject($result))
                        {
                            $status = "offline";
                            if (((int)$row->status) == USER_UNAPPROVED)
                            {
                                $status = "unApproved";
                            }
                            else if (((int)$row->authenticateTimeDifference) < TIME_INTERVAL_FOR_USER_STATUS)
                            {
                                $status = "online";

                            }
                            $out .= "<friend  username = '".$row->username."'  status='".$status."' IP='".$row->IP."' userKey = '".$row->Id."'  port='".$row->port."'/>";



                        }
                            if ($resultmessage = $db->query($sqlmessage))           
                                {
                                while ($rowmessage = $db->fetchObject($resultmessage))
                                    {
                                    $out .= "<message  from='".$rowmessage->username."'  sendt='".$rowmessage->sentdt."' text='".$rowmessage->messagetext."' />";
                                    $sqlendmsg = "UPDATE `messages` SET `read` = 1, `readdt` = '".DATE("Y-m-d H:i")."' WHERE `messages`.`id` = ".$rowmessage->id.";";
                                    $db->query($sqlendmsg);
                                    }
                                }
                        $out .= "</data>";
                }
                else
                {
                    $out = FAILED;
                }           
            }
            else
            {

                    $out = FAILED;
            }



        break;

        case "signUpUser":
            if (isset($_REQUEST['email']))
            {
                 $email = $_REQUEST['email'];       

                 $sql = "select Id from  users 
                                where username = '".$username."' limit 1";



                 if ($result = $db->query($sql))
                 {
                        if ($db->numRows($result) == 0) 
                        {
                                $sql = "insert into users(username, password, email)
                                    values ('".$username."', '".$password."', '".$email."') ";                          

                                    error_log("$sql", 3 , "error_log");
                                if ($db->query($sql))   
                                {
                                        $out = SUCCESSFUL;
                                }               
                                else {
                                        $out = FAILED;
                                }                           
                        }
                        else
                        {
                            $out = SIGN_UP_USERNAME_CRASHED;
                        }
                 }                      
            }
            else
            {
                $out = FAILED;
            }   
        break;

        case "sendMessage":
        if ($userId = authenticateUser($db, $username, $password)) 
            {   
            if (isset($_REQUEST['to']))
            {
                 $tousername = $_REQUEST['to']; 
                 $message = $_REQUEST['message'];   

                 $sqlto = "select Id from  users where username = '".$tousername."' limit 1";



                        if ($resultto = $db->query($sqlto))         
                        {
                            while ($rowto = $db->fetchObject($resultto))
                            {
                                $uto = $rowto->Id;
                            }
                            $sql22 = "INSERT INTO `messages` (`fromuid`, `touid`, `sentdt`, `messagetext`) VALUES ('".$userId."', '".$uto."', '".DATE("Y-m-d H:i")."', '".$message."');";                       

                                    error_log("$sql22", 3 , "error_log");
                                if ($db->query($sql22)) 
                                {
                                        $out = SUCCESSFUL;
                                }               
                                else {
                                        $out = FAILED;
                                }                       
                            $resultto = NULL;
                        }   

            $sqlto = NULL;
            }
            }
            else
            {
                $out = FAILED;
            }   
        break;

        case "addNewFriend":
            $userId = authenticateUser($db, $username, $password);
            if ($userId != NULL)
            {

                if (isset($_REQUEST['friendUserName']))         
                {               
                     $friendUserName = $_REQUEST['friendUserName'];

                     $sql = "select Id from users 
                                     where username='".$friendUserName."' 
                                     limit 1";
                     if ($result = $db->query($sql))
                     {
                            if ($row = $db->fetchObject($result))
                            {
                                 $requestId = $row->Id;

                                 if ($row->Id != $userId)
                                 {
                                         $sql = "insert into friends(providerId, requestId, status)
                                             values(".$userId.", ".$requestId.", ".USER_UNAPPROVED.")";

                                         if ($db->query($sql))
                                         {
                                                $out = SUCCESSFUL;
                                         }
                                         else
                                         {
                                                $out = FAILED;
                                         }
                                }
                                else
                                {
                                    $out = FAILED;  
                                }                                                
                            }
                            else
                            {
                                $out = FAILED;                      
                            }
                     }                               
                     else
                     {
                            $out = FAILED;
                     }              
                }
                else
                {
                        $out = FAILED;
                }           
            }
            else
            {
                $out = FAILED;
            }   
        break;

        case "responseOfFriendReqs":
            $userId = authenticateUser($db, $username, $password);
            if ($userId != NULL)
            {
                $sqlApprove = NULL;
                $sqlDiscard = NULL;
                if (isset($_REQUEST['approvedFriends']))
                {
                      $friendNames = split(",", $_REQUEST['approvedFriends']);
                      $friendCount = count($friendNames);
                      $friendNamesQueryPart = NULL;
                      for ($i = 0; $i < $friendCount; $i++)
                      {
                        if (strlen($friendNames[$i]) > 0)
                        {
                            if ($i > 0 )
                            {
                                $friendNamesQueryPart .= ",";
                            }

                            $friendNamesQueryPart .= "'".$friendNames[$i]."'";

                        }               

                      }
                      if ($friendNamesQueryPart != NULL)
                      {
                        $sqlApprove = "update friends set status = ".USER_APPROVED."
                                        where requestId = ".$userId." and 
                                                    providerId in (select Id from users where username in (".$friendNamesQueryPart."));
                                    ";      
                      }

                }
                if (isset($_REQUEST['discardedFriends']))
                {
                        $friendNames = split(",", $_REQUEST['discardedFriends']);
                      $friendCount = count($friendNames);
                      $friendNamesQueryPart = NULL;
                      for ($i = 0; $i < $friendCount; $i++)
                      {
                        if (strlen($friendNames[$i]) > 0)
                        {
                            if ($i > 0 )
                            {
                                $friendNamesQueryPart .= ",";
                            }

                            $friendNamesQueryPart .= "'".$friendNames[$i]."'";

                        }                   
                      }
                      if ($friendNamesQueryPart != NULL)
                      {
                        $sqlDiscard = "delete from friends 
                                            where requestId = ".$userId." and 
                                                        providerId in (select Id from users where username in (".$friendNamesQueryPart."));
                                                ";
                      }                     
                }
                if (  ($sqlApprove != NULL ? $db->query($sqlApprove) : true) &&
                            ($sqlDiscard != NULL ? $db->query($sqlDiscard) : true) 
                   )
                {
                    $out = SUCCESSFUL;
                }
                else
                {
                    $out = FAILED;
                }       
            }
            else
            {
                $out = FAILED;
            }
        break;

        default:
            $out = FAILED;      
            break;  
    }

    echo $out;



    ///////////////////////////////////////////////////////////////
    function authenticateUser($db, $username, $password)
    {

        $sql22 = "select * from users 
                        where username = '".$username."' and password = '".$password."' 
                        limit 1";

        $out = NULL;
        if ($result22 = $db->query($sql22))
        {
            if ($row22 = $db->fetchObject($result22))
            {
                    $out = $row22->Id;

                    $sql22 = "update users set authenticationTime = NOW(), 
                                                                     IP = '".$_SERVER["REMOTE_ADDR"]."' ,
                                                                     port = 15145 
                                    where Id = ".$row22->Id."
                                    limit 1";

                    $db->query($sql22);             


            }       
        }

        return $out;
    }

    ?>

I think your problem is at the dbHost variable, for the connection beetwen the devices, it needs to have an IP Adress, i asume you had LocalHost at the dbHost before and thats why it was working, so the solution is getting the IP adress of the Data base that you are using for the app and placing it on the code. Of course it's not recommended for you to use an static IP on the host, because if the IP of the database changes you will have to re-write the dbHost value with the new IP