I have an online tutorial build into a web page.
It has button next step.
If you are on page index.php?abc=123 for instance
the code is smart enough to make it index.php?abc=123&step=x

The problem is how to remove step=x from the old url string so that steps don't pile 
up.
index.php?abc=123&step=1&step=2
I'm trying ereg but could use a nudge with the wild card aspect of searching and 
replacing.

The code below builds the get string.

$stepnum = $_GET["step"];

$laststep=$stepnum-1;
$nextstep=$stepnum+1;

$args = $_SERVER["REQUEST_URI"];
if ($_SERVER["argc"]>0) $args.="&";
else $args.="?";

if ($stepnum>1)
 {
 echo "<br><a href='$args";
 echo "step=1'>step 1</a><br>";
 }
 
 if ($laststep>0)
 {
 echo "<br><a href='$args";
 echo "step=$laststep'>backup 1 step</a><br>";
 }
 
 echo "<br><a href='$args";
 echo "step=$nextstep'>next step</a><br>";

thx


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