[英]ajax request to php object
編輯:我解決了! (問題3)
現在我只得到json對象而不再得到HTML
我將在下面的單獨答案中發布我的解決方案,因此更容易理解我的工作。
1.)基本問題:
我想知道是否有可能通過jquery ajax請求獲取php對象中方法的返回值。
換句話說:我嘗試獲取類似以下內容的返回值:
$dbfunctions = new dbfunctions();
$dbfunctions->saveUser(); //<--- the return value of saveUser() is what i need, but in a result of an ajax request
2.)這是我在項目中正在做的事情:
非常簡單-我只想檢查數據庫中是否已存在電子郵件,並使用$ dbfunctions對象的saveUser()方法執行此操作:
$ 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);
}
}
}
非常感謝。
如果基本問題“ 1.)”為“否”,則可以忽略“ 2.)”
編輯:+++更改代碼,獲得奇怪的響應+++
再次您好,感謝您的幫助-我按照您建議的方式使用json_encode更改了代碼(請參見上面“ +++”附近的更改)
並添加了以下JS代碼:
$.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);
}
}
});
我將警報留在內部以檢查響應。 response.message未定義。
但是我不信任他們,所以我只檢查了“響應”。 它也有好有壞:
在響應的開頭我得到了應有的消息,但是在此之后,我得到了許多HTML代碼:
{"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">
(.....)
還有更多。 我得到索引頁面的整個頁面HTML。
也許與我正在使用的小型模板系統有關? 它由“頁面”參數和渲染器對象控制。
在控制器的構造函數中可以這樣: $this->renderer->setTemplate($this->pageVal);
我認為這就是為什么我要獲取整個html代碼的原因:這可能嗎?
3.)
因此,另一個問題是:我可以更改ajax請求,以便僅獲得以下結果:
$dbfunctions->saveUser($entryDatas)
從控制器?
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);
}
}
});
我在單獨的答案中發布了我的解決方案-希望這對其他遇到相同問題的人有所幫助!
解決方案是檢查它是ajax請求還是“正常”請求。 如果這是一個ajax請求,請在構造函數中取消頁面渲染調用。
再次感謝您的幫助! 祝你今天愉快!
如果您對第一個解決方案有任何評論,我會閱讀並在需要時更新答案。
這是代碼:
HTML注冊表格
//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);
}
}
響應應如下所示
//E-Mail is available
{"result":true,"message":"Success"}
//E-Mail already exists
{"result":false,"mail":"Email already exists"}
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