This has been bugging me for the last few hours, and I've tried various searches but never found exactly this issue with an answer. Maybe asking and showing some code will help me get this figured out.
I am using ajax to do a post to PHP, which I want to just give a notification so that I may update a div on the page. In this case, I just need the PHP to say something like "Cfail" which the javascript would use to update page content.
Originally, I was going to try just text responses. So, my PHP for example would be like this:
<?php
session_start(); //Because have an encoded captcha answer.
if(empty($_POST['captinput']) || md5($_POST['captinput']) !== $_SESSION['captchacode']){
echo 'Cfail';
}
?>
The Javascript would be:
$(document).ready(function(){
$('form#Contact').submit(function(e){
e.preventDefault();
var $form = $(this);
var formdata = $form.serialize();
var myurl = $form.attr('action');
$('#loader').stop(true).fadeTo(300,1);
$.ajax({
url: myurl,
dataType: 'text',
cache: 'false',
type: 'POST',
data: formdata,
success: function(returned){
$('#loader').stop(true).fadeTo(300,0);
if(returned=='Cfail'){
alert("I read it right!");
}
}
});
});
});
It would run through the script just fine, but the result never would be what I was asking for. Alert showed the corrct text, however, research indicated that the issue with this was PHP apparently adding white space. The common answer was the encode a JSON response instead. So, I tried that.
Updated PHP:
<?php
sesson_start(); // Captcha Stored in Session
header('Content-type: application/json');
if(empty($_POST['captinput']) || md5($_POST['captinput']) !== $_SESSION['captchacode']){
$result = array('result' => 'Cfail');
echo json_encode($result);
exit;
}
?>
Updated Javascript:
$(document).ready(function(){
$('form#Contact').submit(function(e){
e.preventDefault();
var $form = $(this);
var formdata = $form.serialize();
var myurl = $form.attr('action');
$('#loader').stop(true).fadeTo(300,1);
$.ajax({
url: myurl,
dataType: 'json',
cache: 'false',
type: 'POST',
data: formdata,
success: function(returned){
$('#loader').stop(true).fadeTo(300,0);
if(returned.result=='Cfail'){
alert("I read it right!");
}
}
});
});
});
Which now no longer runs successfully. The alert doesn't come up, and the loader object remains visible(indicating the success never goes through). I tried putting an error section to the ajax, and it indeed fired that. However, I had no idea how to parse or even figure out what the error was exactly. The most I got in trying to get it was what PHP was outputting, which was {"result":"Cfail"} .... Which is what I would EXPECT PHP to give me.
I can work around this, I've done a similar set-up with just echoing a number instead of words and it used to work just fine as far as I knew. I'd just like to figure out what I am doing wrong here.
EDIT:
I managed to figure out what the issue was in my case. I had a require('config.php'); between the session start and the json_encode if statement. For some reason having the external file added, which was just me setting a couple variables for the code further down, some hidden character was added before the first { of the JSON object.
No idea why. As I said, it was just a $var='stuff'; situation in the require, but apparently it caused the issues. :/
Use this like
<?php
sesson_start(); // Captcha Stored in Session
header('Content-type: application/json');
if(empty($_POST['captinput']) || md5($_POST['captinput']) !== $_SESSION['captchacode']){
//$result = array('result' => 'Cfail');
$data['result'] = 'Cfail';
echo json_encode($data);
exit;
}
?>
This works for your javascript
use the below code, in your success call back, first parse the encoded json object that you are recieving from the back end and access the object property result to check it's value
success: function(returned){
returned = JSON.parse(returned);
$('#loader').stop(true).fadeTo(300,0);
if(returned.result=='Cfail'){
alert("I read it right!");
}
Related
I have had this error for multiple days now, I have tried searching this error up but whenever I search this error up it gives a different reason for the error and when I try to add what other sites say it doesn't work which is why I am asking here as I don't see what else I can do.
I am trying to pass a variable from JavaScript to PHP but it is not working and I have no idea why.
Here is my JavaScript code:
<head>
<script type="text/javascript" src="jquery.js"> </script>
</head>
<script>
var variable = "hello";
console.log(variable);
$.ajax
({
url: "ajax.php",
type: "POST",
data:{pass : variable},
success: function() {
alert("Success");
}
});
</script>
Here is my PHP code:
$variable = $_POST['pass'];
echo($variable);
Everything seems to work perfectly. It writes the variable to the console, it comes up with the alert saying success. However I get an error message saying: 'Undefined array key "pass"'
What is causing this? Thank you?
Edit: People have told me to use isset, I have added that it removed the error however it still does not echo the PHP variable, meaning it is still not been passed to PHP, I am still trying to find how to fix this.
Your front end code looks OK, but I don't know your target PHP environement, but maybe your environnement doesn't accept formData.
By default, jQuery send ajax POST data as formData.
Try to send data as JSON
$.ajax({
url: "ajax.php",
type: "POST",
data: JSON.stringify({pass : variable}),
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function(data){alert(data);},
});
And then you will probably have to adapt your php code:
$json = file_get_contents('php://input');
// Converts it into a PHP array
$data = json_decode($json, true);
$variable = $data['pass'];
echo($variable);
Can you please use the developer tools in chrome browser that will help you to find if data is properly sent to php file.
Also you can try $_REQUEST instead of post just to check what data is coming in REQUEST as it works for GET & POST both. If it still does not help you.
Also can you please use
data: {'pass':variable}
instead of
data: {pass:variable}
let me know if it works for you.
If you get this error in your ajax.php file which you Post the data to it, I say it's normal because when you open that file (ajax.php) it's like that there is no $_POST['pass'] because you just opened that file without running JS to send data.
If you want to receive data that you send you can do this:
Your JS code I call this file index:
var variable = "hello";
$.ajax
({
url: "ajax.php",
type: "POST",
data:{pass : variable},
success: function(res) {
alert(res);
}
});
The PHP file:
$variable = $_POST['pass'];
echo($variable);
Then if You open up that index file, after running the JS code it'll send that post data to your PHP file and your PHP file will echo that, then the value will store in that res variable which when every thing went fine, you can see the alert of that res in the page (index file).
Notice that as I said you can't open up the PHP file lonely because it doesn't receive a post data on its own, it is normal for undefined to return.
Re: #puckloe your code is working, php echo wouldn't be printed with ajax(correction echo is working but wouldn't show on page if you don't print it with JS too), you have to catch the response in ajax success function ( like success: function(response) ) and print or alert the response --> success: function(response) { alert("hi look this is echo from php"+response) }
you ajax code should look like
$.ajax
({
url: "ajax.php",
type: "POST",
data:{pass : variable},
success: function(response) {
alert("hi look this is echo from php" + response);
}
});
Good day to all..
I have a problem.. I can't get the values that are send in my ajax code..
This is my ajax code
$(function(){
$('#login').on('submit',function(e){
e.preventDefault();
var user = $('#username').val();
var pass = $('#password').val();
$.ajax({
url:'confirm_login.php',
type:'POST',
data:{user:user, pass: pass},
success : function(data){
alert(data);
}
});
});
});
this is my php code
<?php
echo "outside";
if(isset($_POST['user']) && isset($_POST['pass'])){
echo "inside";
}
?>
When I tried it, the result is outside..
I also tried to remove the echo "outside" but the result is empty..
So I can assume the problem is in the $_POST.. If you guys have encountered and resolved this pls help..
Note: This is in the iis7.5.
I've already resolve it.. When I was looking in the networks tab in the chrome dev tools, I saw that it send a request to confirm_login.php and confirm_login..
I also remember I have a rewrite rule in my web.config that removes the .php in the url.. So what I did was just simply remove the .php in the url of the ajax and it works like a charm..
Just this url:'confirm_login',
I'm trying to send an array from a JS file to a PHP file in the server but when I try to use the array in php, I got nothing.
This is my function in JS:
var sortOrder = [];
var request = function() {
var jsonString = JSON.stringify(sortOrder);
$.ajax({
type: "POST",
url: '<?php echo get_template_directory_uri(); ?>/MYPAGE.php',
data: { sort_order : jsonString },
cache: false,
success: function() {
alert('data sent');
}
})
};
and this is my php file MYPAGE.php:
<?php
$arrayJobs = json_decode(stripslashes($_POST['sort_order']));
echo($arrayJobs);?>
This is the first time that I use ajax and honestly I'm also confused about the url because I'm working on a template in wordpress.
Even if I don't use json it doesn't work!
These are the examples that I'm looking at:
Send array with Ajax to PHP script
Passing JavaScript array to PHP through jQuery $.ajax
First, where is that javascript code? It needs to be in a .php file for the php code (wordpress function) to execute.
Second, how do you know that there is no data received on the back-end. You are sending an AJAX request, and not receiving the result here. If you read the documentation on $.ajax you'll see that the response from the server is passed to the success callback.
$.ajax({
type: "POST",
url: '<?php echo get_template_directory_uri(); ?>/MYPAGE.php',
data: { sort_order : jsonString },
cache: false,
success: function(responseData) {
// consider using console.log for these kind of things.
alert("Data recived: " + responseData);
}
})
You'll see whatever you echo from the PHP code in this alert. Only then you can say if you received nothing.
Also, json_decode will return a JSON object (or an array if you tell it to). You can not echo it out like you have done here. You should instead use print_r for this.
$request = json_decode($_POST['sort_order']);
print_r($request);
And I believe sort_order in the javascript code is empty just for this example and you are actually sending something in your actual code, right?
the problem is in your url, javascript cannot interprate the php tags, what I suggest to you is to pass the "get_template_directory_uri()" as a variable from the main page like that :
<script>
var get_template_directory_uri = "<?php get_template_directory_uri() ?>";
</script>
and after, use this variable in the url property.
Good luck.
I hope it helps
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My overall goal is to send all data from input boxes to a database. However currently I am just trying to get the interaction from the javascript and the PHP working. In the console I can see that the data variable has the value of "". I cannot see why this is happening.
PHP
<?php
$startTime = $_POST["startTime"];
echo $startTime;
?>
HTML
http://pastebin.com/7p9NiV44
Your javascript is working and is sending the value of the startDate input element to your sendHours.php. Your PHP-script is also correct.
By some reason your $_POST array isn't populated and it's not possible to come up with a solution based on your question alone. I would start by checking my php.ini, especially the setting post_max_size.
Also, you could try replacing your PHP-code with a simple <?php echo "Hello world"; ?> to verify that your setup is working to that extent at least.
not a solution but add the error section to get a better idea of what is going on.
function d(){
var startTime = document.getElementById("startTime").value;
console.log(startTime);
$.ajax({
type: "POST",
url: "sendHours.php",
data: {startTime: startTime},
success: function(data){
console.log(data);
},
error: function(err, status) { console.log(err);}
})
}
I'm having a weird issue when returning variables from PHP To Javascript I have a ajax call to a function as seen below(I am using CodeIgniter):
public function automaticEnd(){
$this->load->model('test_model');
$this->test_model->addResult("common");
$id = $this->input->post('id');
echo "success/";
}
In my AJAX call I simply want to see an alert box appear with success/
$.ajax({
type: "POST",
url: "/project/main/automaticEnd",
data: data,
success: function(msg){
alert(msg);
}
});
however I am seeing an output such as:
"0:12:14success/"
anyone seen this issue before? any help would be much appreciated
I believe the problem relies in the addResult() method of your test_model.
Check to see if there is another echo statement in there.
The string before "success/" looks like time. Maybe you echo a value there for testing purposes.