This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Get query string values in JavaScript
I know you could do this by echoing the variable $_GET['whatevervariable'] to a js variable.i was just wondering if there are other methods that can also do this?
This will provide the entire $_GET array to your JavaScript app:
<script type="text/javascript"><!--
_GET = <?php echo json_encode($_GET); ?>;
--></script>
The $_GET superglobal is just an array of the querystring.
You can fetch the querystring in javascript with window.location.search, but to use it like $_GET will need some sort of parsing and usually a few regular expressions to handle difficult characters etc.
Just try var qs = window.location.search; and then figure out exactly what you need, and how you will get it.
The easy solution if doing it inline is just echoing $_GET into a variable, like in danorton's answer.
Related
This question already has answers here:
Can I read the hash portion of the URL on my server-side application (PHP, Ruby, Python, etc.)?
(12 answers)
Closed 9 years ago.
I can do this:
home
But when I have a link with an Id, I can't pass variables:
home <--!this doesn't work of course -->
Thanks a lot!
When using PHP you can not use '#' in the URL, it will not be passed to the server.
You can use urlencode in order to encode the non-alphanumeric characters.
Use window.location.hash in javascript
<script>alert(window.location.hash);</script>
And the parse_url() function in PHP
<?php echo parse_url("home.php?var=home#sectionID",PHP_URL_FRAGMENT);?>
your HTML will be..
home
Declare a variable with $home dollar sign, i think you getting confused with JavaScript variable and PHP. To retrieve the variable values on a new page use $_GET['ID'].
Hope this helps.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Echo PHP variable from JavaScript?
How can I get a PHP variable to AJAX?
I'm trying to get some data from my database with php, and put it in a javascript variable. what is the easiest way to do that using JQuery ?
This is easiest for me, where $var is your array in PHP, being set to the variable "a" in Javascript:
<script type="text/javascript">
var a = <?php echo json_encode($var); ?>;
</script>
This question already has answers here:
How do I pass variables and data from PHP to JavaScript?
(19 answers)
Closed 8 years ago.
Im trying to pass the value of a php variable into javascript but i just cant get it to work. Am I doing anything wrong? Below is the line of code I'm working with.
var dist = parseInt("<?php echo json_encode($distance); ?>");
$distance is an integer? why don't you just write
var dist = <?php echo $distance; ?>
If the value in $distance is just an integer, you don't need the json_encode call. You can just do a php echo of $distance.
Something like
var dist = <?php echo $distance; ?>;
if you right click > view html source in your web browser, you would see for yourself that you have an extra set of quotes.
And, good for you for using json_encode() to output it as a string. That's an excellent way to safely output a value to javascript. although, if its an integer, theres no need here.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Pass a PHP string to a Javascript variable (including escaping newlines)
Access a JavaScript variable from PHP
I have a Javascript function that takes in one variable. The function has some php code inside it. I want to use this variable inside the php section of the function. I couldn't get it to work. How is it done?
The issue is that your PHP code is being rendered on the server before being served to the client. I would recommend either converting the PHP code into Javascript code or creating an AJAX call to the PHP function.
Start reading about AJAX! You will likely need to rewrite some of the code you have written but what you are attempting to accomplish is not really possible otherwise.
try with it
<script>
var whatever = "<?php echo $phpVar ?>";
</script>
This question already has answers here:
PHP $_GET and $_POST undefined problem
(5 answers)
Closed 2 years ago.
I continue to get undefined printed out when I use print($_GET['user_username']); from the previous page. The URL of the page is page.php?user_username=Pete. Why is this happening?
$_GET manual says
An associative array of variables
passed to the current script via the
URL parameters.
First be sure that element exists
<?php
echo !isset($_GET["user_username"]) ? "undefined" : $_GET["user_username"];
?>
Or try var_dump against $_GET array to see if element with user_username key exists.
var_dump($_GET);
Is your request like this one?
http://www.mydomain.com/something.php?user_username=something
Try this code:
print_r($_GET);
You will get all the elements passed using get in array format. Then you can check it.. It also helps better in debugging many times.