Is there a way to check if JavaScript is enabled with PHP? If so, how?
php
javascript
Answers
3
If you're using mod_php, you can use apache_get_modules(). This will return an array of all enabled modules, so to check if mod_rewrite is enabled, you could simply do
in_array('mod_rewrite', apache_get_modules());
Unfortunately, you're most likely trying to do this with CGI, which makes it a little bit more difficult.
You can test it using the following, though
strpos(shell_exec('/usr/local/apache/bin/apachectl -l'), 'mod_rewrite') !== false
If the above condition evaluates to true, then mod_write is enabled.
Tuesday, September 13, 2022
5
You can detect it, but it isn't pretty.
First, you need a new controller with an action that updates a timeout in the session:
class JavascriptController < ApplicationController
def confirm
session[:javascript_updated] = Time.now
end
end
Next you need to include a javascript action in all your pages so this controller action is called on each page load. The easiest way is to include it on a "javascript-confirm.js" file included in your layout (on this particular example I used Prototype's Ajax.Request, so you need to have it included on your javascripts, too):
function confirmJavascript()
{
// Assuming you are using Prototype
new Ajax.Request('/JavascriptController/confirm');
}
myTimeoutFunction();
setInterval(myTimeoutFunction, 10000); // invoke each 10 seconds
This will invoke the confirm action in all your page views. Finally, you have to control how much time did it pass since your last confirmation in your application controller.
class ApplicationController < ActionController::Base
JAVASCRIPT_TIME_LIMIT = 10.seconds
before_filter :prepare_javascript_test
private
def prepare_javascript_test
if (session[:javascript_updated].blank? or
Time.now - session[:javascript_updated] > ApplicationController::JAVASCRIPT_TIME_LIMIT)
@javascript_active = true
else
@javascript_active = false
end
end
end
You will now have a variable called @javascript_active in all your controllers.
It should work even when the user activates/deactivates javascript, with a precision of 10 seconds. It might not work if some of your pages take longer than 10 pages to load (i.e. with lots of images). Increase the time limit in that case (on applicationcontroller and your javascript)
Disclaimer: I haven't tested this code, some bugs might be lurking - but it should point you on the right direction.
Monday, August 29, 2022
2
If you don't want to use javascript, you can handle it via php. Take a look at this lib: http://code.google.com/p/php-mobile-detect/. And then you could do something like:
<?php
include 'Mobile_Detect.php';
$detect = new Mobile_Detect();
if ($detect->isMobile()) {
header('Location: yourpage.php');
exit(0);
}
Friday, October 21, 2022
1
Cookies are not the way to transfer variables between client and server. you should append key/variables pairs to your request URL using either a get (querystring) or post method.
jQuery ajax example;
$.get('http://www.myphpserver.com/script.php?row_id=' + NewCookieValue);
Monday, October 31, 2022
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No, that is not possible, because PHP is a server side language, it does not access the client's browser in any way or form (the client requests from the PHP server).
The client may provide some meta info through HTTP headers, but they don't necessarily tell you whether the user has JavaScript enabled or not and you can't rely on them anyway,