I want to use jQuery to include some PHP at a certain point in the page. When jQuery finds the class #site-index .sitetopic I want to append the content from a PHP file called images.php.
I presume I can use include or file_get_contents
Something like:
OnLoad.find('#site-index .sitetopic')
InsertPHP
You can't insert server side code on the client.
By the time Jquery would execute, the server is already done processing the page.
You could however use an iframe that you use jquery to add, or even use jquery's .load function http://api.jquery.com/load/
You cannot load and execute PHP code on the client side, but you can load the output of images.php.
I'm not sure if you want to place the output where #site-index .sitetopic is, or somewhere else:
// loads the output of images.php into the elements with class sitetopic
$('#site-index .sitetopic').load('images.php');
You can't insert server side code on client side - however you could call the script images.php which would do what you want to achieve.
Use jQuery's get(or post) function:
http://api.jquery.com/jQuery.get/
This allows you to send some variables to your server side script wich in turn returns some html or a variable you can use in your javascript.
As said before, you just can't.
And I assume it was for the sake of speed but don't worry, PHP doesn't include files with an HTTP request but it fetches them from the HDD, so your page won't load slower.
Related
I know PHP runs first but is there a way to get PHP to wait on an ajax request and then run its script? I have a php script here that I want to run but I NEED a variable from my JS file in order for it to run successfully. So was wondering if it's possible?
What I have is a normal request in my JS:
var myvar = data;
$.get('phpscript.php', {myvar: myvar} );
And in PHP:
$myphp = $_GET['myvar'];
But if i echo $myphp it returns "undefined", if I alert it however It displays the value; which means the php script is running before it even gets the request from ajax. Any way I could make the PHP wait?
Thanks.
Put the PHP that requires a variable in its own script and call it from the ajax call, once the ajax call gets a response update the DOM as needed.
PHP runs on server, then javascript runs on client to make the ajax call, then PHP runs on server returning data, then the javascript gets the data and does something with it.
$.get('phpscript.php', {myvar: myvar}, function(data) {
$('.result').html(data);
});
Inside the php file have something like:
$myphp = $_GET['myvar'];
echo $myphp;
The short answer is, no, you can't make PHP wait. PHP only runs on the server-side, by the time the AJAX request is sent, by definition, the page is already been sent to the client.
You'll probably have to do some refactoring. If the variable absolutely needs to be used for a PHP function, then you may need to move that logic into 'phpscript.php' or (less optimally) you may need to issue another AJAX request when you get the response from the first.
But my guess is that more commonly, you'll probably just have to figure out how to do what you want with javascript. If all you want is something equivalent to a PHP echo, you'll want to use Javascript (or JQuery) DOM manipulation for that.
EDIT: I forgot to mention, the other option is simply to do all the PHP stuff on the server-side before you send the page at all, instead of AJAX you'd want to do something in PHP like including your other php script and calling methods from it. But, everything you do on the server-side, the user is sitting there looking at a blank screen waiting for the page to load. So this isn't an option for anything that's not very quick.
Can i get the content or value of the tag with php?
I know i can get it with javascript:
$(function() {
$('class or id').text();
});
But i would like to get it with php, so i can send it back in another query to my sql table.
function changeContentToId(id) {
$("#spanContent").html(id); }
<?php echo "<span onclick='changeContentToId($ob->ID)'>...</span>"; ?>
<span id="spanContent"></span>
This is my code right now, any tips on how to write the top code in php?
thanks. :)
No way : PHP is server-side, and your data is on the client.
Then you have 2 alternatives : getting the information before sending it to the browser (output buffering is a good way), or after, via an AJAX call.
Hope this helps !
Why don't you send it in a 'normal' way ? Like putting the content inside a form then submit it to PHP.
Or get it using Javascript then submit it using AJAX.
PHP won't access client-side information(HTML) once it is in your client(after the content is delivered) you can use client-side manipulation(Javascript) or send it back to server then use it there.
Regards
The simple answer is you cannot do that. PHP is executed on the server before the page is rendered. JavaScript, which updates the content, is executed in the browser after the page is rendered. Hence by the time your content is ready to be read, there is no PHP any more.
The way around it would be to use AJAX to read the info with JavaScript and then send it to another PHP script.
get it with javascript and send it uing ajax to the server.
Just if you really need to, because i don't see any reason since it's generated with php the first time. so you should use the word you want before rendring the html page.
I have written a very basic PHP pagination class and I'm trying to load the content with jQuery Ajax $.post requests. My class has two functions, one displays the content and the other one the pagination. If I don't use jQuery, but only PHP, everything works fine. Once I try to use jQuery, my displayContent() function never gets called, but the createNav() one does its job just fine(I mean the page numbers are loaded).
Here is my js.
http://goo.gl/BUZH1
And here is my PHP:
if($action=='displayArticles') displayArticles();
function displayArticles()
{
$content=new createPages(5,10);
$content->displayContent();
$content->createNav();
}
And here is the PHP class I just created. It was too large to add it in here, but I saved the code in text format.
http://goo.gl/Lv9Wl
Try dumping $_POST['action'], then check the output in the $.post response. It's pretty obvious that your if statement is resolving to false. :)
You can also try dumping $action, then checking that in the response. Good luck!
You can not call PHP functions after the page has been loaded. PHP is server side script, so you need AJAX to load a separate page, where your displayArticles function will be defined.
how can i pass a variable from javascript to php using same file
in this example page keeps refreshing and i don't get to see the result
it works only if i separate the scripts... but i need it somehow like on ajax..
<SCRIPT language="JavaScript">
var carname="Volvo";
location.href="http://localhost/put.php?Result=" + carname;
</SCRIPT>
and this is the seccond part of the script ( they are both in same file )
<?php
Id = $_GET[Result];
echo $dbId;
?>
As Brian said you should put it in a conditional statement.. also your PHP is bad. Try the following
<?php if(isset($_GET["Result"])) : ?>
// do work with set variable
<?php $dbID = $_GET["Result"];
echo($dbID); ?>
<?php else : ?>
// "Result" not set
<SCRIPT language="JavaScript">
var carname="Volvo";
location.href="http://localhost/put.php?Result=" + carname;
</SCRIPT>
<? endif; ?>
I think this is a good exercise if you're trying to learn the Ajax method, in the real world I recommend using a framework like jQuery. Of course understanding how this works will help you build better applications in the end.
So you could do something like this in the PHP script:
if (!isset($_GET['Result']))
{
// include the javascript portion with the redirect
}
I'm with the others, though--I'm not seeing the value in a page load followed by an immediate redirect to the same page.
What you are trying to do cannot be done. Your script runs on the client in real time but the php will run on the server during the request. You will need to make an AJAX request.
First you will want to use Firefox with firebug and the web developer toolbar. Firebug gives a great view of ajax traffic and the web developer toolbar helps you see what's going on in the page.
Use jQuery make an ajax request to "send" the value to another php file. Don't be afraid to separate out files, in fact it's encouraged and considered good programming. If you find your sending a lot if information to a php script you will want to use JSON instead of as part of the url.
Man, you should follow a client-server pattern.. So the Client page can use some ajax to make a request to a Server page. This will response to the Client and you can make with the data what you want.
of course it will keep refreshing:)) Because as soon as the browser gets the js code, it will load that page you specify, which will send your browser the same page... you get the idea. It's like writing for(;;){}
Your question is difficult to understand (for me at least.) My guess is that you are wanting to use AJAX to send data to the server and receive a response without leaving the page.
Probably the easiest way to accomplish this is to use a library such as jQuery. (see jQuery.ajax())
PHP only runs on the server and the javascript only runs on the client. By the time your client is running the javascript, no more PHP can be executed on that request.
I was wondering how i could achieve using <?php?> in javascript for url's? There's a certain route you have to go, Anyone know?
the normal way for example:
$fetchContent = $('#div').load('website/members #content');
What i'm trying to do:
$fetchContent = $('#grav').load('<?php?> #poppu');
Yep, thats wrong as hell lol, but i'm sure someone knows
I would also like to know how to tie php with javascript, but thats probably a whole new topic
You said it right :)
Yep, thats wrong as hell lol, but i'm
sure someone knows
Anyway, from your php script, output the url as a javascript code anywhere in the script before the javascript used for ajax call, e.g.
<?php
echo '<script language="javascript"> var g_ajax_url = "'. $the_url . '";</script>';
?>
and in your javascript, use it this way
$fetchContent = $('#grav').load(g_ajax_url + ' #poppu');
What it simply does is define g_ajax_url as a global variable with the proper php value, and you can use that variable in your js as you use other variables.
To tie php with js directly, try looking into xmlrpc topic.
If javascript is in .php file you can use <?php echo $url ?> and if the file is .js you can't use <?php ?>
It is not clear to me what you are trying to achieve. I assume you are using the jQuery load() function, if yes, you should state so.
You can't load php during javascript execution because the php has already been processes and rendered as HTML and sent back to the client. As PHP is processes on the server it is logical that you cannot run it on the client side.
You could of course send an AJAX request to the server that runs a certain php page and you will be able to use the response as you please.
you can't necessarily "tie" them together because they operate in two different spectrums of processing, php being processed on the server, and javascript being processed in the browser.
You can however render javascript within a php file.
if your javascript is included within a <script> tag within your php page your example should work should actually work. The php would render the urls into the script before it is sent to the browser.
if you are wanting to load external javascript files with php inlcuded urls, you will need to set the proper headers and include the php file just as you would a normal .js file.
good article on this topic HERE
You cannot execute <?php ?> inside JavaScript, but inside PHP you can declare a global variable as:
var x = '<?php echo x;?>';
or, if it's an array, store it as JSON:
var x = <?php json_encode(x); ?>
then access the JavaScript variables inside the external JavaScript.