简单的PHP数据库连接

问题描述

我正在制作一个简单的页面来测试数据库连接。当我尝试从浏览器访问它时，它说：

I am making a simple page to test a database connection. When I tried accessing it from my browser, it says:

该网站在检索时遇到错误 http：// localhost：8888 / blah / blah / test.php 。

The website encountered an error while retrieving http://localhost:8888/blah/blah/test.php. It may be down for maintenance or configured incorrectly.

以下是一些建议：

稍后重新加载此网页。 HTTP错误500（内部服务器错误）：服务器尝试满足请求时遇到了意外情况。

Reload this webpage later. HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.

我正在做的就是连接到数据库并显示表格。到目前为止，这里是我的PHP代码：

All I am doing is connecting to a database and displaying the tables. Here is what I have so far as the PHP code:

<?php
// Get Variables
$dbname = $_GET["dbname"];
$dbusername = $_GET["dbusername"];
$dbpass = $_GET["dbpass"];
$dbhost = $_GET["dbhost"];






$connection = mysql_connect("$dbhost","$dbusername","$dbpass");
if (!$connection)
{
    die('Could not connect: ' . mysql_error());
}
else
{
    echo "Connected";

    $dbcheck = mysql_select_db("$dbname");
    if (!$dbcheck) {
        echo mysql_error();
    }else{
        echo "<p>Successfully connected to the database '" . $database . "'</p>\n";
// Check tables
        $sql = "SHOW TABLES FROM `$database`";
        $result = mysql_query($sql);
        if (mysql_num_rows($result) > 0) {
            echo "<p>Available tables:</p>\n";
            echo "<pre>\n";
            while ($row = mysql_fetch_row($result)) {
                echo "{$row[0]}\n";
            }
            echo "</pre>\n";
        } else {
            echo "<p>The database '" . $database . "' contains no tables.</p>\n";
            echo mysql_error();
        }



    }

// some code

    mysql_close($con);



    ?>

我在WAMP Apache日志中的错误是：

My error in the WAMP Apache logs is:

[03-Feb-2013 22:47:37 UTC] PHP Parse error:  syntax error, unexpected end of file                              in /Applications/MAMP/htdocs/coursemanager/default/verify1.php on line 52

文件意外结束是什么？

推荐答案

您在结束时忘记了}： else {echo Connected;

You forgot a } on the end to close: else{ echo "Connected";

<?php

// Get Variables
$dbname = $_GET["dbname"];
$dbusername = $_GET["dbusername"];
$dbpass = $_GET["dbpass"];
$dbhost = $_GET["dbhost"];


$connection = mysql_connect("$dbhost", "$dbusername", "$dbpass");
if (!$connection) {
    die('Could not connect: ' . mysql_error());
} else {
    echo "Connected";

    $dbcheck = mysql_select_db("$dbname");
    if (!$dbcheck) {
        echo mysql_error();
    } else {
        echo "<p>Successfully connected to the database '" . $database . "'</p>\n";
// Check tables
        $sql = "SHOW TABLES FROM `$database`";
        $result = mysql_query($sql);
        if (mysql_num_rows($result) > 0) {
            echo "<p>Available tables:</p>\n";
            echo "<pre>\n";
            while ($row = mysql_fetch_row($result)) {
                echo "{$row[0]}\n";
            }
            echo "</pre>\n";
        } else {
            echo "<p>The database '" . $database . "' contains no tables.</p>\n";
            echo mysql_error();
        }
    }
}
// some code. no need to close mysql and no need to close php

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