variables in links

[shadowmonk]

Hi, I know there is another thread on here that is along these lines, but this one is different, trust me.

 

I have a link that is already passing variables, my problem is trying to add onto the link. If i use the $_SERVER['PHP_SELF'] variable I only get up to the filename. If I use the # sign in the href tag I get the whole link, but I can't append a variable to it.

 

Is this possible or do I need to create multiple links based on what variables are present?

[Wildbug]

urlencode()

[shadowmonk]

I don't think urlencode() will work, based on how I'm understanding the documentation and examples.

 

Let me try to clarify my problem with examples-

 

say my link is already: http://mysite.com/script.php?var=rand

 

What I'm trying to do is using a link within the page to append "&var2=foobar"

 

If I use the php_self I just get: http://mysite.com/script.php&var2=foobar

If I use # in the href it's: http://mysite.com/script.php?var=rand#&var2=foobar

 

The # is close, but it is looking for a link titled "&var2=foobar" somewhere on the page instead of passing it to the script as a variable. I was thinking the javascript this.href might work, but I can't figure out how to get it to work.

[chigley]

$_SERVER["QUERY_STRING"]

[Wildbug]

Oh, well, check the phpinfo() function.  There are other vars besides PHP_SELF.

 

<?php

$newvar = 'this=that';
$newlink = $_SERVER['PHP_SELF'] . '?' . $_SERVER['QUERY_STRING'] . ($_SERVER['QUERY_STRING'] ? '&' : '') . $newvar;

?>

[roopurt18]

Use string concatenation.

 

<?php
  // Long version
  $url = $_SERVER['PHP_SELF'];
  $url .= "?var=foo";
  $url .= "&var2=bar";

  // Short version
  $url = $_SERVER['PHP_SELF'] . "?var=foo&var2=bar";
?>

[shadowmonk]

the $_SEVER['QUERY_STRING'] works, I just needed to explode it into an array so I don't keep adding the same variable onto it every time it's clicked.

 

I think I'm going to leave this open for a little bit, just in case I have any more questions related to this.

[kenrbnsn]

Instead of using the explode() function, you probably want to use the parse_str() function.

 

Ken

[shadowmonk]

I could see the benefit of using parse_str() in other situations, but in this case using the explode() function allows me to keep the same link for multiple uses rather than just once. I might end up using it though, depending on how the project progresses.