Question

在一个PHP文件中，我解析数据库（“ Chat”）中的数据，并以XML格式回显所有数据。然后，在我的index.php文件中，如果单击一个按钮，我将执行ajax请求以从XML检索数据。为什么我失败了？将数据从query.php文件回显到index.php文件是否正确？

query.php

#connect to database
$servername = "localhost";
$username = "root";
$password = "root";
$db_name = "Concerts";

try
{
    $db = new PDO("mysql: host=$servername; dbname=$db_name", $username, $password);
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
    echo "Connection failed: " . $e->getMessage();
    die;
}



$result = $db->query("SELECT * FROM events");


echo '<?xml version="1.0" encoding="UTF-8"?>
<event>';

foreach ($result as $row)
{
    echo "<title>" . $row['title'] . "</title>";
    echo "<details>" . $row['details'] . "</details>";
    echo "<date>" . $row['date'] . "</date>";
    echo "<place>" . $row['place'] . "</place>";
}

echo "</event>";
?>

index.php

<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>

        <button onclick="myFunc()"> Click </button>


        <script type="text/javascript" src="prototype.js"></script>

        <script>
            function myFunc()
            {
                new Ajax.Request('query.php',
                {
                    method: "get",
                    onSuccess: function(ajax) 
                    { 
                        ajax.getElementsByTagName("title");
                    },
                    onFailure: function() { alert("failure"); },
                    onException: function() { alert("exception"); }
                }
                );
            }
        </script
    </body>
</html>

从Ajax原型检索XML数据

0 个答案: