为什么浏览器返回false？？？？
<?php
$servername = 'localhost';
try {
$pdo = new PDO("mysql:host=$servername;dbname=imooc", "root", "root");
$sql = <<<EOF
INSERT user(username,password,email)VALUES("king1","king1","king@qq.com"),
INSERT user(username,password,email)VALUES("king1","king1","king@qq.com"),
INSERT user(username,password,email)VALUES("king1","king1","king@qq.com")
EOF;
$res = $pdo->exec($sql);
echo $res;
} catch (PDOException $e) {
echo $e->Message();
}
?>
