PDO Function

<?php
/*
Usage:
$pdoClass = PDO();
$pdoStmt = PDO($statement);
$pdoStmt = PDO($statement, $input_parameters);

*/

function PDO($query=false, $data=false) {
    global $pdo, $config;

    // Start PDO if its not started
    if (!$pdo) {
        $pdo = new PDO($config['pdo']['dsn'], $config['pdo']['username'], $config['pdo']['password'], $config['pdo']['driver_options']);
    }

    // We want to run a query
    if ($query) {

        // Data was passed so we want a prepare/execute
        if (is_array($data)) {
            $stmt = $pdo->prepare($query);
            $stmt->execute($data);
            return $stmt;

        // No data/invalid so just do query
        } else {
            return $pdo->query($query);
        }

    // Just return the global $pdo
    } else {
        return $pdo;
    }
}