PHP not reading javascript cookies

[cleibesouza]

Hi all, here's my problem.

I need to check if javascript is enabled during a user visit. So, I'm trying to set a cookie using javascript then I try to read it using PHP. If cookie exists I'm setting a session variable that will be passed across the aplication.

Keep in mind that I need to do all of this on the same page.

I even tried to  set the cookie (through javascript) on a different page and use a php header redirect but the php receiving page doesn't read the cookie.

 

Here's the code:

<script language="javascript">
		function createCookie(name,value,days) {
			if(days){
				var date = new Date();
				date.setTime(date.getTime()+(days*24*60*60*1000));
				var expires = "; expires="+date.toGMTString();
			}else{
				var expires = "";
			}//end if/else
			document.cookie = name+"="+value+expires+"; path=/";
		}//end function
		createCookie('isReady', 'y', 1);
	</script>

 

PHP CODE:

if(strlen($_COOKIE['isReady'])){
$_SESSION['javascriptReady'] = true;
}//end if

 

It only works when I refresh the page.

 

Thanks for any help.

 

[Sudantha]

may be it disstory the cookie and creates a new one

 

for check is javascript is enabled or not why dont u use the <noscript></noscript>  tags ? 

[Joshua4550]

for check is javascript is enabled or not why dont u use the <noscript></noscript>  tags ? 

 

This ^

 

It's built into HTML, theres no need for Javascript to do anything to check if they have it enabled.

[cleibesouza]

I tried to follow your suggestion of the <noscript> tag and added this:

<script language="javascript"> 
function createCookie(name,value,days) {
	if(days){
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}else{
		var expires = "";
	}//end if/else
	document.cookie = name+"="+value+expires+"; path=/";
}//end function
createCookie('isReady', 'y', 1); 
</script>

<noscript>
<?php $_SESSION['javascriptReady'] = false; ?>
</noscript>

No success...

[cleibesouza]

Thank you for your help.

I found another solution

 

 

[galloway]

I'm a little late here, and you have probably figured this out already, but the reason php only detects your javascript-set cookie after you refresh the page is that php has already process by the time you are looking at you web page, which is where and when javascript happens. So, by the time your javascript can set a cookie, it is too late for php to do anything until you reload the page.

 

Server side processing like php, asp, cold fusion, perl, etc. always do their work before they serve you your html. Javascript operates only on what php has already processed.

Edited June 20, 2013 by galloway