Formated php message sender (Erthe)

<!DOCTYPE html5 PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns:og="http://opengraphprotocol.org/schema/" xmlns:lang="en" xmlns:fb="http://ogp.me/ns/fb#" class="js">

<head>
<title> Group SMS Sender v0.1 </title>

</head>

<!-- Main Body Code -->
<body>


<?php

if (isset($_POST['GroupMsg']))
{
    $pass = $_POST['pass'];
    $members = $_POST['members'];
    $members = $members-1;
    $number = explode(" ",$_POST['mobile']);
    $nextmsg = $_POST['message'];
    $nextmsg = urlencode("{$nextmsg}") ;
    $random = rand (200000, 900000);
    $random = $random;
    if($pass == "sippu")
    {
        if($number == '9017444348' || $number == '7206828233')
        {
            echo "Not allowed on this number";
        }

        if($number == '')
        {
            echo "Please enter a mobile number";
        }
        else
        {
            for ($value=0; $value<=$members; $value++)
            {
                $numbers = explode(' ', $_POST['mobile']);
                foreach ($numbers as $number)
                {
                    var_dump($number);
                }
                $res = file_get_contents("http://localhost/sms?username=superadmin&password=greatpass&to={$number}&from=GroupMSG&text={$nextmsg}+Meesage+Random+Number+:+{$random}");
                //echo "Message sent. Countdown:" . " $value ";
                echo "<br>";
                echo "" . $res . " to " . $number . "";
                echo "<br>";
                $nextmsg = $_POST['message'];
                $nextmsg = urlencode("{$nextmsg}") ;
                $random = rand (200000, 900000);
                $random = $random;
            }
        }
    }
    else
    {
        echo "Incorrect Password";
    }
}
else
{
?>
<div id="GroupMessageForm">
<form action="" method="POST" name="groupmsg" enctype="multipart/form-data">
<div>Mobile Number:</div>
<input tabindex="1" required="required" placeholder="Enter Mobile Number" type="text" autocomplete="on" name="mobile" id="mobile" autofocus="autofocus">
<div>No. of members:</div>
<input tabindex="2" required="required" placeholder="99" type="text" maxlength="2" autocomplete="on" name="members" id="members">
<div>Message for the group:</div>
<input tabindex="3" required="required" placeholder="Hello guys and girls." autocomplete="on" type="text" name="message" id="message">
<div>Password:</div>
<input tabindex="4" required="required" placeholder="Password" type="password" autocomplete="on" name="pass" id="pass">
<input tabindex="5" align="center" type="submit" name="GroupMsg" value="Send Group Message"/>
</form>
</div>

<?
}
?>

</body>
</html>