ajax request to php object
Question
EDIT: I SOLVED IT! (QUESTION 3)
now i only get the json object nad not the HTML anymore
I'll post my solution in a separate answer below, so its easier to understand what i did.
1.) Basic question:
I'd like to know if it is possible to get the return value of a method in a php object via jquery ajax request.
In other words: I try to get the return value of something like this:
$dbfunctions = new dbfunctions();
$dbfunctions->saveUser(); //<--- the return value of saveUser() is what i need, but in a result of an ajax request
2.) Here is what i'm doing in my project:
Its very simple - i just wanna check if an E-Mail already exists in my database and i do this with this saveUser() method of my $dbfunctions object:
$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'] . "');"
// (...)
);
}
}
}
$controller
class controller {
//constructor and preparing some variables (...)
public function dbStuff() {
if (isset($_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);
}
}
}
Thanks a lot.
If the Basic question "1.)" is "no", you can ignore "2.)"
EDIT: +++ CHANGED CODE, GETTING STRANGE RESPONSE +++
Hello again, thanks for your help - i changed code as you suggested using json_encode(see changes above near the "+++")
And added following JS-Code:
$.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);
}
}
});
I left the alerts inside to check the response. The response.message is undefined.
But i didn't trust them so i checked the "response" only. And it was good and bad too:
I got the deserved message at the beginning of the response, but after it, i get lots of HTML-Code:
{"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">
(.....)
and lots more. I get the entire page HTML of my index page.
Maybe it has something to do with the small templatesystem i'm working with? It is controlled by "page" parameter and a renderer object.
ike this in the constructor of the controller: $this->renderer->setTemplate($this->pageVal);
I think this is why im getting the entire html-code: is this possible?
3.)
So another question is: Can i change the ajax request so i get only the result of
$dbfunctions->saveUser($entryDatas)
from the controller?
2 answers
solution1
0 ACCPTED 2014-03-29 12:38:36
In your controller;
if ($dbfunctions->saveUser($entryDatas) === false) {
$res = array(
"result" => false,
"message" => "Email already exists"
);
} else {
$res = array(
"result" => true,
"message" => "Success"
);
}
echo json_encode($res);
And in js,
$.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);
}
}
});
solution2
0 2014-04-01 20:32:50
I'm posting my solution in i seperate answer - i hope this will help others with the same problem!
The Solution is to check if it is an ajax request or a "normal" request. And if it's an ajax request, deaktivate the page rendering call in the constructor.
Thank you for your help again! Have a nice day!
If you leave comments to this first solution i'll read it and update the answer of course if needed.
Here's the code:
HTML REGISTER FORM
//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: $(registerform).serialize(),
dataType: 'json', //<-- don't forget this or u will get undefined
success: function(response) {
if (response.result === true) {
console.log("response result: " + response.result);
// window.location = "..../index.php?page=confirmation?var=your_email"
} else {
console.log("response result: " + response.result);
}
}
});
}
controller
class controller {
//(...) some variables
public function __construct() {
//(...) initializing the rendering stuff here
//check if it's an ajax request
if($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);
}
}
THE RESPONSE should look like this
//E-Mail is available
{"result":true,"message":"Success"}
//E-Mail already exists
{"result":false,"mail":"Email already exists"}
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