PDO Fatal Error update - php

Question

I'm receiving this error and it's got me scratching my head:
Fatal error: Uncaught exception 'PDOException' with message 'invalid
data source name' in
/Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php:10
Stack trace: #0
/Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php(10):
PDO->__construct('SELECT title FR...') #1
/Users/aaronwilson/Desktop/testing_server/ATOM_CMS/config/setup.php(30):
get_title(NULL, 'blog') #2
/Users/aaronwilson/Desktop/testing_server/ATOM_CMS/index.php(2):
include('/Users/aaronwil...') #3 {main} thrown in
/Users/aaronwilson/Desktop/testing_server/ATOM_CMS/functions/sandbox.php
on line 10
Here's the sandbox.php code:
<?php ## Sandbox PHP/PDO Functions
function get_page($dbc, $pg) {
$sql = new PDO("SELECT * FROM pages WHERE page = '$pg' AND status = 1 LIMIT 1");
$stmt = $dbc->prepare($sql);
$stmt->execute();
$row = $stmt->fetch();
echo '<h1>'.$page['title'].'</h1>';
echo '<div class="content">'.$page['body'].'</div>';}
function get_title($dbc, $pg)
$sql = new PDO("SELECT title FROM pages WHERE page = '$pg' AND status = 1 LIMIT 1");
$stmt = $dbc->prepare($sql);
$stmt->execute();
$row = $stmt->fetch();
return $page['title'];}
?>
On Setup.php there is a S_GET function to pull the url to call the function on sandbox.php:
if ($_GET ['page'] == '') {
$pg = 'home';}
else {
$pg = $_GET ['page']; }

Answer 1

new PDO("SELECT * FROM pages WHERE page = '$pg' AND status = 1 LIMIT 1");
That's not how you create a PDO object, its parameters are different, it does not take in a query. Following is the constructor prototype.
public PDO::__construct() ( string $dsn [, string $username [, string $password [, array $driver_options ]]] )
Send parameters to it accordingly. Send dsn, username, password.
Example from php.net
<?php
/* Connect to an ODBC database using driver invocation */
$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';
try {
$dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
?>
Source

Answer 2

Your are not using properly the PDO Library , and thats what causes errors.
Here is an example of one from many correct ways : (Adapt it to your situation and im sure it will help you )
$variable1 = "somthing";
$variable2 = "somewhat";
try
{
require_once("db-info.php");
$pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
$db = new PDO('mysql:host='.$host.';dbname=' . $dbname, $dbuser, $dbpassword, $pdo_options);
$response = $db->prepare('SELECT column1, column2 FROM table WHERE column1 = :value1 and column2 = :value2');
$response->execute(array('value1' => $variable1,
'value2' => $variable2
));
$data = $response->fetch(); // works for one set of data
// if your are trying to fetch multiple line use a (while $data = $response->fetch())
//and insert your code inside the while loop.
//insert your code here....
//.........................
//.............
//using a return true or false may help you with your function case
$response->closeCursor();
}
catch (Exception $error)
{
die('error while selecting data' . $error->getMessage());
}