Returning id from access database - php

Question

this is my code that is inserting data into an access database using php.
$conn = new COM ("ADODB.Connection") or die("Cannot start ADO");
$connStr = "PROVIDER=Microsoft.Ace.OLEDB.12.0;Data Source=" . realpath(‘my access path’) . ";";
// Open the connection to the database
$conn->open($connStr);
$query = “my insert query here which inserts into theaccess database fine”
$query2 = "select ##IDENTITY"
try{
$rs = $conn->execute($query);
$idReturned = $conn->lastInsertId();
echo json_encode($idReturned);
} catch(com_exception $e){
echo($e);
}
I’m trying to get the returned id but all I am getting is the below error :
exception 'com_exception' with message 'Source: ADODB.Connection
Description: Arguments are of the wrong type, are out of acceptable
range, or are in conflict with one another.' in
C:\inetpub\wwwroot\agency\createnewvaluation.php:132 Stack trace: #0
C:\inetpub\wwwroot\agency\createnewvaluation.php(132):
com->lastInsertId() #1 {main}

Answer 1

I went though the results manually and got the code myself
if($dbh->getAttribute(PDO::ATTR_DRIVER_NAME) == 'pgsql') {
} elseif($dbh->getAttribute(PDO::ATTR_DRIVER_NAME) == 'odbc') {
$sb = $dbh->prepare('SELECT ##IDENTITY AS lastID');
$sb->execute();
$row = $sb->fetch(PDO::FETCH_ASSOC);
$arr = array("ref" => $row["lastID"]);
echo json_encode($arr);
} else {
$arr = array("ref" => "error");
echo json_encode($arr);
}