When I pass the results from getJSON to parseInfo() function just like the one below, is it possible to get results back into a php variable so that I could put the latter through another php function.
$.getJSON('getinfo.php', { id:id }, parseInfo);
function parseInfo(data) {
<?php
$some_var = json_decode(data);
function some_function($some_var) {
// rest of the script here...
}
?>
}
Can anyone please help me out with this? I would really appreciate it.
Cheers!
PHP runs BEFORE the page is sent. Javascript runs AFTER the page is sent. Therefore the only way to can run PHP is to request a page.
So, if you wanted to pass data to PHP, you would have to call another page like ajax.php:
<?php
$data = $_POST['data'];
// ... do stuff ...
?>
From your script:
$.post('ajax.php', data);
See this question.
Related
Okay so, I've scoured stackoverflow for this answer and have come across several threads talking about how to do this, and well, they just haven't helped me yet.
This is all on one page, so that's probably the big problem. I really don't wanna send the post data to some other page and then redirect back to the one in order to get this to work, but I will if you guys cannot assist me in this endeavor.
Anyway, I have this page and I'm trying to pass data to the php via ajax, and I know that php is a server-side language, so the page would have to be reloaded once the data is passed.
php:
if (isset($_POST['location'])) {
echo $_POST['location'];
echo "hey";
}
jquery:
var whateva = "hello";
$.post('index.php', {'location': whateva}, function(){
//alert(data);
//window.location.reload(true);
});
alert(data); does get it to work and echo out given the isset (and also prints out all of the other html), but that is an alert which isn't practical, especially from a user standpoint. But that means that this ajax function is working. The problem here is that I want the same page to load, just with the $_POST['location'] variable set, so I had the bright idea of just reloading the page as the function in this case, which doesn't work. The isset never succeeds
Any help will be appreciated, besides telling me that combining php and javascript is a horrible idea as I already know that
Edit:
I was told to try making another page to post the data back which still didn't work, here's the code for that (with the main page ajax adjusted to direct it there instead):
window.onload = function(){
var inter = <?php echo json_encode($_POST['location']); ?>;
$.post('index.php', {location: inter});
}
I have tried it with and without quotes around location in the .post. Also I have tried to just have the plain javascript there, without the onload, still nothing. The response on the main page when changed to this
$.post('intermediary.php', {location: whateva}, function(response) {
// Log the response to the console
console.log("Response: "+response);
});
it prints out the html of the hidden page, with the variable filled in (var inter = "hello" instead of having the php there, as it should), so the passing to that page works
Ok, here's the breakdown.
File one: index.html
This file is HTML and Javascript only, and is the page seen by the user. This could be a php page, but it does not need to be. Notice the quotes around the string 'whateva'.
<html><head></head><body>
<script>
$.post('intermediary.php', {location: 'whateva'}, function(response) {
// Log the response to the console
console.log("Response: "+response);
});
</script>
</body></html>
File two: intermediary.php
This file is PHP only. It receives data silently through POST and returns data by echoing it.
<?php
if (isset($_POST['location'])) {
echo $_POST['location'];
echo "hey";
} else {
echo 'No data received!';
}
?>
Oh.... It's a simple mistake. your ajax syntax is wrong... Remove the quotes of ajax parameter inside the curly brackets. Just like
var whateva = "hello";
$.post('index.php', {location: whateva}, function(){
//alert(data);
//window.location.reload(true);
});
It will working fine.... But you might use variable to ajax paramete then, you should use variable name for ajax location parameter value. But you might use string for location parameter value, then you should use it value inside the quotes like this, $.post('yourfile.php',{location:'your_name'},function(){});. But you might use some value of location parameter use should type this code.$.post('yourfile.php',{location:30},function(){});
So I have the following code that someone else helped me get:
function updateEpisodeSeen() {
var anime_id = <? php echo $anime_id; ?> ;
var anime_list_entry_id = <? php echo $anime_list_entry_id; ?> ;
jQuery.post("/path_to_it/my_php_file.php", {
firstParam: anime_id,
secondParam: anime_list_entry_id
}, function (data) {
//this is your response data from serv
console.log(data);
});
return false;
}
Now the .php file that is ran, I update some information and echo two variables out.
So in the console.log(data); those two variable values are shown properly. I am just wondering how I can show these values in my actual php code? Since these values are updated on the backend, I want to show the users their updated values on the front end as well. So if I could possibly set a php variable to those responses and then echo those instead, but php code isn't ran until a page refreshes so that might not be the way to go since I want the values to update without the page refreshing.
if you want to assign the response to some PHP variable you can follow this
jQuery Ajax response variable from php
if you want assign to a html variable you can do that using Jquery
$('#ID OF FIELD').val(data.text);
or
$('#ID OF FIELD').html(data.text);
I want javascript to be able to call a php script (which just echos a string) using jQuery.
I think $.get is the right way, but not too sure.
I then want to use the returned string as a javascript variable.
$.get() is the way to go, indeed.
First of all, you will need a page / url that outputs the result of the function you want to use (for example, *www.yoursite.com/test_output.php* ). You should create that page and call the function you want to use there.
Also keep in mind that I said output, not return, because .get will fetch the output of the http response, not the returned value of the php function.
So if you have the following function defined in your site (you can also define it in test_output.php, of course):
<?php
function say_hello() {
return 'hello world';
}
?>
In test_output.php, you will need something like this:
<?php
echo say_hello();
?>
Then on the client side, you need some JavaScript / jQuery:
var data_from_ajax;
$.get('http://www.yoursite.com/test_output.php', function(data) {
data_from_ajax = data;
});
Now you have the output of the ajax .get() function stored in data_from_ajax and you can use it as you please.
$.get() is the right way.
$.get('ajax/test.php', function(data) {
// use the result
alert(data);
});
I have a php function that builds a list of items for me. Im not sure but i read that you cant call a php function explicitly though jQuery/js.
So i saw that you can still call php pages like this:
$("#name").click(function(){
$("#div").load("script.php");
});
If i can call a php page like that, is there also a way to send it a URL when that page is loaded like this?
$("#name").click(function(){
$("#div").load("script.php", 'http://gdata.youtube.com/feeds/');
});
also another problem comes up that how do i make the script accept that string through from jQuery?
normally when you call a function you pass parameter with the call like so:
<?php makeList( 'http://gdata.youtube.com/feeds/' ); ?>
//on the function-side
<?php
function makeList( $feedURL )
{
//...stuff that uses $feedURL...
}
?>
Since i will make the function a script that runs upon being called how would i pass it a parameter?
I have no idea if this is possible or not and i would understand if this creates tons of security issues which makes it not acceptable.
You have the $.get and $.post methods in jQuery.
$.post('script.php', { url: 'http://gdata.youtube.com/feeds/' }, function(data) {
//data will hold the output of your script.php
});
The url is posted to your PHP script and you can access it through $_POST['url'].
See jQuery.ajax(), the 'sending data to the server' example.
I have a javascript variable which holds some information and I want that to assign in a PHP variable. Here is what I am using:
<script type="text/javascript">
function redirectToFacebook()
{
var facebookMessage = encodeURI(document.getElementById('txt_msg').value);
}
</script>
<?php
$_SESSION['sess_facebook_message'] = facebookMessage;
?>
Any help is really appriciable.
Thanks in advance
Because PHP runs on the server, and JavaScript in the client, there is no way to set a PHP session variable after JavaScript works with it, as PHP has done executing before the page was even sent.
However...
If you use JavaScript to make a request (AJAX, imagehack or otherwise) to a PHP script that sets the variable, you can.
For example...
JavaScript:
function something() {
// do something with somevar
somevar = 'content';
// make an AJAX request to setvar.php?value=content
}
PHP:
$_SESSION['somevar'] = $_GET['somevar'];
Make sure you take security issues of client-generated data into account, though.
If you want to pass variables from the browser (javascript) to your backend server (PHP), you need to either:
1) Load a new page with Javascript parameters encoded either as POST or GET
2) Asynchronously call a PHP script (AJAX call) encoding the parameters as POST or GET
A simple example using a GET request (you simply append your parameters to the URL):
<script>
window.location = '/some-url?' + document.getElementById('text_msg').value;
</script>
You probably want to assign this piece of code to a button or something...
what you are trying to achieve is not possible due to API limitation.It does not provide that.
may be you can try to redirect with javascript and pass variables form php to js. They way yout tru it, it can't work.
may be, im realy not shure
try this.
<?php
function redirectToFacebook() {
var facebookMessage = ?>
<script>
document.write(encodeURI(document.getElementById('txt_msg').value));
</script>
<?php
}
?>
or using cookies.