SQLSRV bind param thats in mysql - php

Question

I'm trying to convert this mysql code to work using sqlsrv
$planeId = $_GET["pid"];
$conn = OpenCon();
$sql = "SELECT id, pid, fullname, tat, date, engine1, engine2, engine3, engine4 FROM oil WHERE pid = ? order by date desc";
$stmnt = $conn->prepare($sql);
$stmnt->bind_param("s", $planeId);
$stmnt->bind_result($id, $pid, $fullname, $tat, $date, $engine1, $engine2, $engine3, $engine4);
$stmnt->execute();
$theRows = Array();
while ( $stmnt->fetch() )
{
$aRow['id'] = "$id";
$aRow['pid'] = "$pid";
$aRow['fullname'] = $fullname;
$aRow['tat'] = $tat;
$aRow['date'] = $date;
$aRow['engine1'] = $engine1;
$aRow['engine2'] = $engine2;
$aRow['engine3'] = $engine3;
$aRow['engine4'] = $engine4;
$theRows[] = $aRow;
}
$stmnt->close();
echo json_encode($theRows);
CloseCon($conn);
This I what I've done so far but I'm missing the bind-param function not sure how to implement that. Because the output keeps coming out like this
[{"id":"","pid":"","fullname":null,"tat":null,"date":null,"engine1":null,"engine2":null,"engine3":null,"engine4":null}]
Even though I know there's an entry in Microsoft DB
$planeId = $_GET["pid"];
$theRows = Array();
$conn = OpenCon();
$query = "SELECT id, pid, fullname, tat, date, engine1, engine2, engine3, engine4 FROM oil WHERE pid = ? order by date desc";
//$stmnt = $conn->prepare($query);
$stmnt = sqlsrv_prepare($conn, $query, array(&$planeId));
if (sqlsrv_execute($stmnt) === false){
die( print_r( sqlsrv_errors(), true));
}
else{
while ( sqlsrv_fetch($stmnt) )
{
$aRow['id'] = "$id";
$aRow['pid'] = "$pid";
$aRow['fullname'] = $fullname;
$aRow['tat'] = $tat;
$aRow['date'] = $date;
$aRow['engine1'] = $engine1;
$aRow['engine2'] = $engine2;
$aRow['engine3'] = $engine3;
$aRow['engine4'] = $engine4;
$theRows[] = $aRow;
}
echo json_encode($theRows);
}
CloseCon($conn);