[PDO]⑦--query()方法执行查询语句

$pdo->query($sql)

3;";
    $stmt = $pdo->query($sql);
    var_dump($stmt);
    /*
     * object(PDOStatement)[2]
  public 'queryString' => string 'select * from user where id>3;' (length=30)
     *如果错的返回false
    */
    echo "
";
    foreach ($stmt as $row) {
        //var_dump($row);
        echo "编号:" . $row['id'] . "
";
        echo "用户名:" . $row['username'] . "
";
        echo "邮箱:" . $row['email'] . "
";
        echo "
";
    }

} catch (PDOException $e) {
    echo $e->getMessage();
}

?>

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添加

query($sql);
    $stmt = $pdo->query($sql);
    var_dump($stmt);//boolean false

} catch (PDOException $e) {
    echo $e->getMessage();
}
?>