google chart api date format - date

Question

The below answer suggested works using mysql_ however I have decided to switch to PDO for the increased security if offers. However When I apply the same code, I am struggling to get it to work.I had to switch the while to foreach for PDO.
UPDATE: Using PHP PDO
$sql = "SELECT * FROM userrecords";
$stmt = $conn->prepare($sql);
$stmt->execute();
$data = $stmt->fetchAll();
foreach ($data as $row)
{
$dateArray = explode('-', $row['eventdate']);
$year = $dateArray[0];
$month= $dateArray[1] - 1;
$day= $dateArray[2];
$dataArray[] = "[new Date ($year, $month, $day), {$row['scientificname']}, {$row['category_of_taxom']}]";
}
echo $dataArray;

Answer 1

Building on the solution from your other question, you have to parse your dates into javascript's Date object format:
$dataArray = array();
while($row = mysqli_fetch_array($result)) {
$dateArray = explode('-', $row['Date']);
$year = $dateArray[0];
$month = $dateArray[1] - 1; // subtract 1 since javascript months are zero-indexed
$day = $dateArray[2];
$dataArray[] = "[new Date($year, $month, $day), {$row['SpeciesA']}, {$row['Speciesb']}]";
}
Because the json_encode function will break the dates here, we have to parse it into the DataTable constructor a bit differently:
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Species A');
data.addColumn('number', 'Species B');
data.addRows(<?php echo '[' . implode(',', $dataArray) . ']'; ?>);