Egold Bezahlung Überprüfen per Script

<?php
#
# todo: mehrmals abfragen verhindern
# TX_ID überprüfen
# falls mehr e*g gesendet wird
# kein tx angegeben kontrolieren
#
# elitepvpers.com
# Lizenz: Public Domain
#

$TX_ID = $_GET["tx"];

$USERID = "";
$SECRET_WORD = "";
$EG_PREIS = "";

$API_LINK = "http://www.elitepvpers.com/theblackmarket/api/transactions.php?u={$USERID}&type=received&secretw ord={$SECRET_WORD}";

$temp = file_get_contents($API_LINK);

$temp = json_decode($temp);

$received = FALSE;
foreach ($temp as $t) {
if($t->eg_transactionid == $TX_ID && $t->amount == $EG_PREIS)
{
$received = TRUE;
break;
}
}

if($received == TRUE)
{
echo "OK";
} else {
echo "Nicht OK";
}

?>