Question

我尝试为连接到数据库的网站创建安装程序，如果不存在则会创建数据库和表。

我添加了一个mysql连接验证表单，以确保服务器实际上在线，这样如果失败，他们就不必一次又一次地填写表单。

每次都会发回数据，这些都是我的结果：

如果主机确实是主机并且输入了正确的凭据，则会发送成功消息。
如果主机确实是主机并且输入了错误的凭据，则会发送失败消息。
如果主机不是主机并且输入了随机凭据，则不会返回任何消息，并且控制台出现故障。

我想知道为什么会这样，有什么想法吗？

checkdb.php

<?php

    if( empty($_POST) ) {
        $output = array("error" => true, "text" => "You didn't fill out the form.");
        die(json_encode($output));
    } else {
        if( empty($_POST["db_host"]) ) {
            $output = array("error" => true, "text" => "You didn't fill out the host field.");
            echo json_encode($output);
            die();
        }
        if( empty($_POST["db_user"]) ) {
            $output = array("error" => true, "text" => "You didn't fill out the username field.");
            echo json_encode($output);
            die();
        }

        try {
            $db = new PDO("mysql:host=" . $_POST["db_host"], $_POST["db_user"], $_POST["db_pass"]);
            if($db == false) {
                $output = array("error" => true, "text" => "There was an error connecting to the database.");
                die(json_encode($output));
            } else {
                $output = array("error" => false, "text" => "Successfully connected to database, proceed with installation.");
                die(json_encode($output));
            }
            //$db->exec("CREATE DATABASE `mcm_db`;") or die(print_r($db->errorInfo(), true));
            //$sql = file_get_contents("defaults/sql.sql");
        } catch(PDOException $ex) {
            $output = array("error" => true, "text" => $ex->getMessage());
            die(json_encode($output));
        }

        $output = array("error" => true, "text" => "TEST THIS NEVER RETURNS");
        die(json_encode($output));
    }

?>

install.php（充当javascript文件）

<?php

    if( file_exists("../../app/Configuration/config.php") ) {
        require "../../app/Configuration/config.php";
    } else if( file_exists("../../install/defaults/config.php") ) {
        require "../../install/defaults/config.php";
    } else {
        die("Could not find the default configuration file or the modified configuration file.");
    }

    header('Content-Type: application/javascript');

?>

$(window).load(function() {
    $('#checkdb').submit(function(event) {
        event.preventDefault();

        var formData = {
            'db_host': $('input[name=db_host]').val(),
            'db_user': $('input[name=db_user]').val(),
            'db_pass': $('input[name=db_pass]').val()
        };

        $.ajax({
            type: 'POST',
            url: '<?php echo URL; ?>/install/checkdb.php',
            data: formData,
            success: function (json_data) {
                var data_array = $.parseJSON(json_data);
                if (data_array['error'] == false) {
                    $.notify(data_array['text'], "success");
                    $('#checkdb input').addClass('input-success');
                } else {
                    $.notify(data_array['text'], "error");
                    $('#checkdb input').addClass('input-failure');
                }
            },
            fail: function () {
                $.notify("There was an error while submitting the AJAX request.", "error");
            }
        });
    });
});

的index.php

<?php

    if( file_exists("../app/Configuration/config.php") ) {
        require "../app/Configuration/config.php";
    } else if( file_exists("../install/defaults/config.php") ) {
        require "../install/defaults/config.php";
    } else {
        die("Could not find the default configuration file or the modified configuration file.");
    }

?>

<!doctype html>
<html>

    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">

        <title>MCManager Installer</title>

        <link rel="stylesheet" media="screen" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
        <link rel="stylesheet" href="<?php echo URL; ?>/resources/css/bootstrap.min.css"></link>
        <link rel="stylesheet" href="<?php echo URL; ?>/resources/css/css.install.php" />

        <script type="text/javascript" src="<?php echo URL; ?>/resources/js/jquery.min.js"></script>
        <script type="text/javascript" src="<?php echo URL; ?>/resources/js/jquery.notify.js"></script>
        <script type="text/javascript" src="<?php echo URL; ?>/resources/js/bootstrap.min.js"></script>
    </head>

    <body>

        <div class="content container">
            <div id="checkdb_msg" class="msg"><p></p></div>
            <div class="module">
                <div class="module-header">
                    <h4>MCManager Installer</h4>
                </div>
                <div class="module-body module-padding">
                    <form id="checkdb" method="post" action="<?php echo URL;?>/installer/checkdb.php">
                        <div class="row">
                            <div class="col-md-8">
                                <input type="text" name="db_host" placeholder="Host">
                                <br />
                                <input type="text" name="db_user" placeholder="Username">
                                <br />
                                <input type="text" name="db_pass" placeholder="Password">
                                <br />
                                <input type="submit" name="submit" placeholder="Test Connection" id="checkdb_btn" class="btn btn-primary">
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <script type="text/javascript" src="<?php echo URL; ?>/resources/js/install.php"></script>

    </body>
</html>

用ajax和php验证mysql连接

0 个答案: