找出这串代码的错误并给出正确答案<?php $servername = "127.0.0.1"; $username = "root"; $password = "123456" $dbname="stu_result"; $conn = new mysqli($servername,$username,$password,$dbname); @mysqli_set_charset($conn,utf8); if($conn->connect_eorror) { die("连接失败：" . $conn->connect_error); } ?>

这段代码的错误是缺少一个分号在第 3 行，导致语法错误。正确的代码如下所示：

<?php 
$servername = "127.0.0.1"; 
$username = "root"; 
$password = "123456"; // 加上分号
$dbname = "stu_result"; 
$conn = new mysqli($servername, $username, $password, $dbname); 
@mysqli_set_charset($conn, "utf8"); // 加上双引号
if ($conn->connect_error) { 
    die("连接失败：" . $conn->connect_error); 
} 
?>