UPDATE mysql table from Oracle query - php

Question

So I've seen posts of updating mysql table from mysql queries, but I can't seem to find the right answer for updating from an Oracle dbase query. I've tried so many different ways of formatting this that now I'm just at a loss of things to try. I'm not sure whether I need to be echoing the results of the oracle query or not. Any help would be greatly appreciated and I'll be happy to try and explain anything that's not clear. I'm not a programmer by any means, just basically teaching myself.
<?php
error_reporting(E_ALL ^ E_NOTICE);
$SD = $_POST[SD];
$ED = $_POST[ED];
$db = '(DESCRIPTION=
(ADDRESS=
(PROTOCOL=TCP)
(HOST=host)
(PORT=port)
)
(CONNECT_DATA=
(SERVICE_NAME=name)
)
)
';
$c1 = oci_connect("user", "pass", $db);
$sql = oci_parse($c1, "ALTER SESSION SET NLS_DATE_FORMAT = 'mm/dd/yyyy'");
oci_execute($sql);
$sql = oci_parse($c1, "SELECT ulid, itmcod, locatn, casqty, ctlgrp, expdat, subsit, qastat from invent_view");
oci_execute($sql);
$results = array();
while ($result = oci_fetch_array($sql)){
$results[] = $result;
foreach ($results as $result){
$ULID = ($result['ULID']);
$ITMCOD = ($result['ITMCOD']);
$LOCATN = ($result['LOCATN']);
$CASQTY = ($result['CASQTY']);
$CTLGRP = ($result['CTLGRP']);
$EXPDAT = ($result['EXPDAT']);
$SUBSIT = ($result['SUBSIT']);
$QASTAT = ($result['QASTAT']);
}
echo $ULID . '<br/>';
echo $ITMCOD . '<br/>';
echo $LOCATN . '<br/>';
echo $CASQTY . '<br/>';
echo $CTLGRP . '<br/>';
echo $EXPDAT . '<br/>';
echo $SUBSIT . '<br/>';
echo $QASTAT . '<br/>';
}
?>
<?php
$servername = "server";
$username = "user";
$password = "pass";
try {
$conn = new PDO("mysql:host=$servername;dbname=dbname", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "UPDATE `dbname`.`invent_view` SET `ULID` = '$ULID', `ITMCOD` = '$ITMCOD', `LOCATN` = '$LOCATN', `CASQTY` = '$CASQTY', `CTLGRP` = '$CTLGRP', `EXPDAT` = '$EXPDAT', `SUBSIT` = '$SUBSIT', `QASTAT` = '$QASTAT'";
$stmt = $conn->prepare($sql);
$stmt->execute();
echo $stmt->rowCount() . "records UPDATED successfully";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>