如果有人能够帮助我解决这个问题,我真的很感激它 - 我几乎已经开始工作了!读取会话变量以写入数据库
基本上,我做了一段时间我自己的应用程序想法,我这样做的原因是因为我是编程新手,所以我觉得它会教我很多关于不同的元素(即添加,更新和删除记录)。
所以在这个例子中,我有一个用户登录成功,并且它创建了一个正在被其他表单传递的会话。我希望他们能够增加一笔交易 - 我几乎拥有这笔交易,但似乎与其中一部分斗争。
我的HTML代码:
<!DOCTYPE html>
<html>
<head>
<title>Find A Deal</title>
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0"/>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
<link rel="stylesheet" href="http://localhost/findadeal/themes/deal.css" />
<style>
#login-button {
margin-top: 30px;
}
</style>
<script src="http://www.dragan-gaic.info/js/jquery-1.8.2.min.js"></script>
<script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>
<script src="js/custom3.js"></script>
<script src="js/custom4.js"></script>
<?php
if(!isset($_SESSION)){
session_start();
}
if(isset($_SESSION['username'])){
/* User is logged in */
echo "IT WORKS!";
} ?>
</head>
<body>
<div data-role="page" id="login">
<div data-theme="a" data-role="header">
<h3>Find A Deal</h3>
</div>
<div data-role="content">
<label for="username">Enter your username:</label>
<input type="text" value="" name="username" id="username"/>
<label for="password">Enter your password:</label>
<input type="password" value="" name="password" id="password"/>
<a data-role="button" id="login-button" data-theme="b">Login</a>
</div>
<div data-theme="a" data-role="footer" data-position="fixed">
</div>
</div>
<!--Newly rendered page after successful login!-->
<div data-role="page" id="index">
<div data-theme="a" data-role="header">
<h2>Find A Deal</h2>
</div>
<div data-role="content">
<?php
if(!isset($_SESSION)){
session_start();
}
if(isset($_SESSION['username'])){
echo "IT WORKS!";
} ?>
<h3></h3>
<a href="#view" data-role="button" data-icon="search">View Deals</a>
<a href="#add" data-role="button" data-icon="plus">Add Deals</a>
</div>
</div>
<!--View Deal Page-->
<div data-role="page" id="view">
<div data-role="header">
<h2>Find A Deal</h2>
</div>
<div data-role="content">
<?php
if(!isset($_SESSION)){
session_start();
}
if(isset($_SESSION['username'])){
echo "IT WORKS!";
} ?>
<h3></h3>
<p>test so I know I'm onto a new page</p>
<a href="#view" data-role="button" data-icon="search">View Deals</a>
<a href="#add" data-role="button" data-icon="plus">Add Deals</a>
</div>
<div data-role="footer">
</div>
</div>
<!--Add Deal Page-->
<div data-role="page" id="add">
<script src="js/custom4.js"></script>
<div data-role="header">
<h2>Find A Deal</h2>
</div>
<div data-role="content">
<?php
if(!isset($_SESSION)){
session_start();
}
if(isset($_SESSION['username'])){
echo "It's working!";
} ?>
<label for="name">Deal Name:</label>
<input type="text" value="" name="name" id="name"/>
<label for="desc">Description</label>
<input type="text" value="" name="desc" id="desc"/>
<a data-role="button" id="submit-button" data-theme="b">Submit</a>
</div>
</div>
</body>
</html>
所以才解释说 - 第一页是一个登录页面,它带给你的旁边指数这仅仅是一个菜单页面我已经成立了,然后从该菜单可以选择2页中的1页 - 查看交易并添加交易。我现在正在与增加交易一分钟。
添加交易时,用户将交易名称和说明输入到相关文本框中,以便将其添加到数据库中。 我使用这个js函数:
//Adding a new deal
$(document).on('pagebeforeshow', '#add', function(){
$('#submit-button').on('click', function(){
if($('#name').val().length > 0 && $('#desc').val().length > 0){
userObject.name = $('#name').val(); // Put username into the object
userObject.desc = $('#desc').val(); // Put password into the object
// Convert an userObject to a JSON string representation
var outputJSON = JSON.stringify(userObject);
// Send data to server through ajax call
// action is functionality we want to call and outputJSON is our data
ajax.sendRequest({action : 'add', outputJSON : outputJSON});
} else {
alert('Please fill all nececery fields');
}
});
});
$(document).on('pagebeforeshow', '#index', function(){
if(userObject.name.length == 0){ // If username is not set (lets say after force page refresh) get us back to the login page
$.mobile.changePage("#add", { transition: "slide"}); // In case result is true change page to Index
}
$(this).find('[data-role="content"] h3').append('Deal Added:' + userObject.name); // Change header with added message
//$("#index").trigger('pagecreate');
});
// This will be an ajax function set
var ajax = {
sendRequest:function(save_data){
$.ajax({url: 'http://localhost/findadeal/login/json3.php',
data: save_data,
async: true,
beforeSend: function() {
// This callback function will trigger before data is sent
$.mobile.showPageLoadingMsg(true); // This will show ajax spinner
},
complete: function() {
// This callback function will trigger on data sent/received complete
$.mobile.hidePageLoadingMsg(); // This will hide ajax spinner
},
success: function (result) {
if(result == "true") {
$.mobile.changePage("#index", { transition: "slide"}); // In case result is true change page to Index
} else {
alert('Deal Addition has been unsuccessful, please try again!'); // In case result is false throw an error
}
// This callback function will trigger on successful action
},
error: function (request,error) {
// This callback function will trigger on unsuccessful action
alert('Error has occurred, please try again!');
}
});
}
}
// We will use this object to store username and password before we serialize it and send to server. This part can be done in numerous ways but I like this approach because it is simple
var userObject = {
name : "",
desc : ""
}
这将随后被输送到一个PHP文件,准备将输入写入到数据库这样的:
<?php
$var1 = $_REQUEST['action']; // We dont need action for this tutorial, but in a complex code you need a way to determine ajax action nature
$jsonObject = json_decode($_REQUEST['utputJSON']); // Decode JSON object into readable PHP object
$name = $jsonObject->{'name'}; // Get name from object
$desc = $jsonObject->{'desc'}; // Get desc from object
mysql_connect("localhost","root",""); // Conect to mysql, first parameter is location, second is mysql username and a third one is a mysql password
@mysql_select_db("findadeal") or die("Unable to select database"); // Connect to database called test
$query = "INSERT INTO deal (dname, description) VALUES ('$name' ,'$desc')";
$result=mysql_query($query);
$num = mysql_numrows($result);
if($num != 0) {
echo "true";
} else {
echo "false";
}
?>
这一切工作正常,但是,数据未被插入到数据库的原因是因为它需要用户名中的用户名存储在会话变量中的ID。
我想帮什么用是:
有人能告诉我你是怎么从会话变量获取数据,并把它带过来给PHP文件。 2.此外,会话变量正在存储用户名 - 有没有一种方法可以自行检查其相关的userid标记,还是必须通过PHP文件中的SQL语句来完成。
我希望我没有造成任何困惑,我已经明确了自己有什么问题。我是一名学生,所以在学习过程中,所有的帮助将受到赞赏!我觉得应该把会话数据通过JavaScript函数像其他数据一样去思考,或者是否应该能够直接读取写入PHP文件或什么? =/
谢谢你的时间!
如果您已经有HTML输出,则无法正确处理会话。请确保您在撰写HTML – 2013-02-16 12:19:11
Hi @ axel.michel的任何一行之前启动会话(在每个页面上),谢谢您的评论。我没有正确处理会话吗?我有一个session_start()变量上的PHP登录正在阅读,然后我有会话if语句工作沿所有其他页面呈现的变量举行? 到目前为止,它似乎一直在为我工作?如果有其他事情我应该寻找? – user2025934 2013-02-16 12:22:34
你为什么不尝试cookies? – rohitarora 2013-02-16 12:30:47