このプログラムが PHP の PDO でうまくいかないのはなぜですか?

<br />
<?php<br />
try {<br />
	$dbh = new PDO('mysql:dbname=mytest;host=localhost', 'root', '19aeacv44899d4ff');<br />
	<br />
	$query = 'INSERT INTO contactInfo(name, address, phone) VALUES(?, ?, ?)';<br />
	$stmt = $dbh->prepare($query);<br />
<br />
	$name 	 = '张某某';<br />
	$address = '海珠区';<br />
	$phone 	 = '15814535527';<br />
	$stmt->bindParam(1, $name);<br />
	$stmt->bindParam(2, $address);<br />
	$stmt->bindParam(3, $phone);<br />
<br />
	$stmt->execute();<br />
	if ($insertID = $dbh->lastInsertId()) {<br />
		echo $insertID.'<br />';<br />
	} else {<br />
		echo '插入出错！';<br />
		exit();<br />
	}<br />
} catch(PDOException $d) {<br />
	echo '数据库连接失败：'.$e->getMessage();<br />
	exit();<br />
}<br />
<br />