Description:
------------
I have noticed an issue when working with MySQL and PDO prepare statements. If running a foreach on an array which contains the params for the prepare statement, all params equal the value of the last param in the array. 

See below.

Test script:
---------------
$pdo = new PDO('mysql:dbname=netsec_v2;host=localhost;', 'root', '');
$stmt = $pdo->prepare("CREATE TABLE BugTest 
			(
			ID int NOT NULL AUTO_INCREMENT,
			PRIMARY KEY(ID),
			ColumnA varchar(15) NOT NULL,
			ColumnB int NOT NULL
			)");
$stmt->execute();
		
$array = array(":ColumnA" => "A", ":ColumnB" => 1);
		
$stmt2 = $pdo->prepare("INSERT INTO BugTest (ColumnA,ColumnB) VALUES (:ColumnA, :ColumnB)");

foreach($array as $param => $value){
	$stmt2->bindParam($param, $value);	
}
$stmt2->execute();
		
$res = $pdo->query("SELECT * FROM BugTest")->fetchAll(PDO::FETCH_ASSOC);
var_dump($res);


Expected result:
----------------
ColumnA = A
ColumnB = 1

Actual result:
--------------
ColumnA = 1
ColumnB = 1