Adding to url with link - php

Question

My url contains many variables that I want untouched (don't worry they aren't important).
Let's say it contained...
../index.php?id=5
How would I make a url that just adds
&current=1
rather than replacing it entirely?
I'd like...
../index.php?id=5&current=1
rather than..
../index.php?current=1
I know it's a simple question but that's why I can't figure it out.
Thanks.

Answer 1

To append a parameter to a URL you can do this:
function addParam( $url, $param ){
if( strrpos( $url, '?' ) === false){
$url .= '?' . $param;
} else {
$url .= '&' . $param;
}
return $url;
}
$url = "../index.php?id=5";
$url = addParam( $url, "current=1");

Answer 2

You should just create your link to 'add' that parameter
The Link
and then obviously in the index.php somewhere you'll look for the current variable and do what you need to:
<?php
if(isset($_GET['current']) && !empty($_GET['current]) {
// Do stuff here for the 'current' variable
$current = trim($_GET['current']);
}
?>

Answer 3

On the links that you require the $current variable, I suppose that you could just casually put it in the href attribute. For the index,php file, so something like this....
if(isset($_GET['current']))
{
$current = $_GET['current'];
//Do the rest of what you need to do with this variable
}

Answer 4

Try this one:
$givenVar = "";
foreach($_GET as $key=>$val){
$givenVar .= "&".$key."=".$val;
}
$var = "&num=1";
$link = "?".$givenVar."".$var;
echo $link;

Answer 5

You can just add the variable to the href,
When you clink it while the address is
../index.php?id=5
trust me you then go to
../index.php?id=5&current=1
BUT if you click that link again, than you 'll go to
../index.php?id=5&current=1&current=1
Actually I thinks that's tricky and bad practice to just append the variable.
I suggest you to do it like:
<?php
$query = isset($_GET) ? http_build_query($_GET) . '&current=1' : 'current=1';
?>
A Label
take a look http://us.php.net/manual/en/function.http-build-query.php

Answer 6

I don't know why in Earth you would need this, but here we are. This should do the trick.
$appendString = "&current=1";
$pageURL = $_SERVER["REQUEST_URI"].$appendString;
$_SERVER["REQUEST_URI"] should return just the name of the requested page, with any other GET variable attached. The other string should be clear enough!