Can you please help us to insert this below php in the specified page?

Dear SupportIndeed

Can you help me inserting the following Php Script into the listener page in my website: ethiosomjobs.com/listener/

The php script is:

<?php
$req = "cmd=notify-validate";

foreach($_POST as $key => $value)
{
$value = urlencode(stripslashes($value));
$req.= "&$key=$value";
}

$url = 'http://sandbox.flocash.com/validateNotify.do';
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
$res = curl_exec($ch);

if (curl_errno($ch))
{
$log_mess.= "CONN-ERROR:" . curl_error($ch) . "\n";
$fp_file = fopen('flocash.txt', 'a');
fwrite($fp_file, $log_mess);
fclose($fp_file);
exit();
}
else
{
curl_close($ch);
$log.= "\n"."Got-data : " . $req . "\n";
$log.= "Data: ".$res."\n";
$fp = fopen('log.txt', 'a');
fwrite($fp, "$log");
if (strcmp($res, "VERIFIED") == 0)
{
$merchant = $_POST['merchant'];
$trans_id = $_POST['trans_id'];
$fpn_id = $_POST['fpn_id'];
$order_id = $_POST['order_id'];
$customer = $_POST['payer_email'];
$sender_acct = $_POST['sender_acct'];
$item_name = $_POST['item_name'];
$item_price = $_POST['item_price'];
$quantity = $_POST['quantity'];
$amount = $_POST['amount'];
$currency_code = $_POST['currency_code'];
$status = $_POST['status'];
$status_msg = $_POST['status_msg'];
if (!($merchant == '[email protected]'))
{
$log.= "Log: Invalid merchant email. " . $message . "\n";
fwrite($fp, "$log");
fclose($fp);
exit();
}
if (!(strcmp($status, "0000") == 0))
{
fwrite($fp, "Log: Payment not successful"."\n");
fclose($fp);
exit();
}
$con = mysql_connect("localhost", "myfastco_renu", "flocash@123");
if (!$con)
{
fwrite($fp, "FailedtoconnecttoMySQL:".mysql_error());
fclose($fp);
}
else
{
if(mysql_select_db("myfastco_flocash_renu"))
{
$query = "INSERT INTO notify_trans(trans_id, fpn_id, sender_acct, order_id, item_name, item_price, currency_code, quantity, amount,customer, status, status_msg) values('$trans_id', '$fpn_id', '$sender_acct', '$order_id', '$item_name', '$item_price', '$currency_code', '$quantity', '$amount', '$customer', '$status', '$status_msg')";
$result = mysql_query($query);
if($result)
{
if(mysql_insert_id())
{
fwrite($fp, "\n"."inserted successfully");
fclose($fp);

}
else
{
fwrite($fp, "\n".$query."\n".mysql_error());
fclose($fp);
}
}
}
mysql_close();
}
}
}
fclose($fp);
?>