[英]ajax request to php object
编辑:我解决了! (问题3)
现在我只得到json对象而不再得到HTML
我将在下面的单独答案中发布我的解决方案,因此更容易理解我的工作。
1.)基本问题:
我想知道是否有可能通过jquery ajax请求获取php对象中方法的返回值。
换句话说:我尝试获取类似以下内容的返回值:
$dbfunctions = new dbfunctions();
$dbfunctions->saveUser(); //<--- the return value of saveUser() is what i need, but in a result of an ajax request
2.)这是我在项目中正在做的事情:
非常简单-我只想检查数据库中是否已存在电子邮件,并使用$ dbfunctions对象的saveUser()方法执行此操作:
$ dbfunctions:
class dbfunctions {
//(...)
public function saveUser(array $datas) {
//(...) preparing some variables for mysql query
$sqlMail = $this->mysqli->query("SELECT `email` from `myTable` WHERE `email` = '" . $this->mysqli->escape_string($datas['email']) . "';");
if ($sqlMail->num_rows) { //<--- check if mail exists in DB
return false; //<-- this is what i need in the ajax result
} else {
$this->mysqli->query("INSERT INTO `TABLE` (`name`, `street`, `email`)
VALUES('" .
$this->mysqli->escape_string($datas['name']) . "','" .
$this->mysqli->escape_string($datas['street']) . "','" .
$this->mysqli->escape_string($datas['email'] . "');"
// (...)
);
}
}
}
$控制器
class controller {
//constructor and preparing some variables (...)
public function dbStuff() {
if (isset($_GET['action']) && $_GET['action'] != "") {
require_once 'dbfunctions.php';
$dbfunctions = new dbfunctions();
//Save new User
if ($_GET['action'] == 'newUser') {
$entryDatas = array(
'first_name' => trim($_POST['name']),
'street' => trim($_POST['street']),
'email' => trim($_POST['email']),
//(...)
);
//THIS IS WHAT I DID WITHOUT AJAX
/*if ($dbfunctions->saveUser($entryDatas) === false) {
header("Location: index.php?page=registerform&mail=exists");
//in the registerform page a message is displayed via echo
// "your mail already exists"
} else {
//everything is cool
header("Location: index.php?page=confirmation?var=xyz);
}*/
/*+++ AND I CHANGED IT TO +++*/
if ($dbfunctions->saveUser($entryDatas) === false) {
$res = array(
"result" => false,
"message" => "Email already exists"
);
echo json_encode($res);
} else {
$code = $dbfunctions->getOptinHash();
$res = array(
"result" => true,
"message" => "Success"
);
echo json_encode($res);
}
}
}
非常感谢。
如果基本问题“ 1.)”为“否”,则可以忽略“ 2.)”
编辑:+++更改代码,获得奇怪的响应+++
再次您好,感谢您的帮助-我按照您建议的方式使用json_encode更改了代码(请参见上面“ +++”附近的更改)
并添加了以下JS代码:
$.ajax({
url: "index.php?action=newUser",
type: "POST",
data: $(registerform).serialize(),
success: function(response) {
if (response.result === true) {
alert("success: " + response.message);
// window.location = "..../index.php?page=confirmation?var=your_email"
} else {
alert("fail: " + response.message);
}
}
});
我将警报留在内部以检查响应。 response.message未定义。
但是我不信任他们,所以我只检查了“响应”。 它也有好有坏:
在响应的开头我得到了应有的消息,但是在此之后,我得到了许多HTML代码:
{"result":false,"message":"Email already exists"}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1" />
<title>some title</title>
<meta name="language" content="de">
(.....)
还有更多。 我得到索引页面的整个页面HTML。
也许与我正在使用的小型模板系统有关? 它由“页面”参数和渲染器对象控制。
在控制器的构造函数中可以这样: $this->renderer->setTemplate($this->pageVal);
我认为这就是为什么我要获取整个html代码的原因:这可能吗?
3.)
因此,另一个问题是:我可以更改ajax请求,以便仅获得以下结果:
$dbfunctions->saveUser($entryDatas)
从控制器?
在您的控制器中;
if ($dbfunctions->saveUser($entryDatas) === false) {
$res = array(
"result" => false,
"message" => "Email already exists"
);
} else {
$res = array(
"result" => true,
"message" => "Success"
);
}
echo json_encode($res);
在js中
$.ajax({
url: "your_url",
type: "POST",
data: "action=newUser&name=your_name&street=your_street&email=your_email",
success: function(response) {
if(response.result == true) {
window.location = "..../index.php?page=confirmation?var=your_email"
} else {
alert(response.message);
}
}
});
我在单独的答案中发布了我的解决方案-希望这对其他遇到相同问题的人有所帮助!
解决方案是检查它是ajax请求还是“正常”请求。 如果这是一个ajax请求,请在构造函数中取消页面渲染调用。
再次感谢您的帮助! 祝你今天愉快!
如果您对第一个解决方案有任何评论,我会阅读并在需要时更新答案。
这是代码:
HTML注册表格
//action is index.php?action=newUser
<form name="registerform" id="registerform" method="post" action="index.php?action=newUser" accept-charset="UTF-8">
//(...)
javaScript:
$(document).ready(function() {
//(...)
$('#registerform').on('submit', function(e) {
e.preventDefault();
var formAction = $(this).attr('action');
//console.log('Sending request to ' + formAction + ' with data: '+$(this).serialize());
validateRegisterForm();
});
}
function validateRegisterForm() {
//doing some form validation(...)
//CHECK IF E-MAIL EXISTS
$.ajax({
url: $(registerform).attr('action') + "&request=ajax", //<--this is the "check if request is an ajax request"
type: "POST",
data: $(registerform).serialize(),
dataType: 'json', //<-- don't forget this or u will get undefined
success: function(response) {
if (response.result === true) {
console.log("response result: " + response.result);
// window.location = "..../index.php?page=confirmation?var=your_email"
} else {
console.log("response result: " + response.result);
}
}
});
}
控制者
class controller {
//(...) some variables
public function __construct() {
//(...) initializing the rendering stuff here
//check if it's an ajax request
if($this->ajaxRequest == false){
$this->render->renderTemplate($page);
}
}
//(...)
if ($dbfunctions->saveUser($entryDatas) === false) {
$res = array(
"result" => false,
"mail" => "Email already exists"
);
echo json_encode($res);
} else {
$res = array(
"result" => true,
"message" => "Success"
);
echo json_encode($res);
}
}
响应应如下所示
//E-Mail is available
{"result":true,"message":"Success"}
//E-Mail already exists
{"result":false,"mail":"Email already exists"}
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