PHP Recordset Paging, changing url Parameter -

bit of newby php & mysql, , use dreamweavers inbuilt functions, trying hands dirty , understand things little more , subsequently fix couple of problems.

i have file (search.php) when viewed has 2 url parameters 'letter' , 'search' 'search.php?letter=a&search=no'

within body of page, have recordset paging function (from dreamweaver). when using paging, end url similar this

'search.php?pagenum_results_empty=1&totalrows_results_empty=2937&letter=a&search=no' 

very want change parameter 'search' 'no' 'yes'. can work out, need remove 'search=no' query string, , add 'search=yes' link. i'm not not able remove query string, or barking wrong tree.

any advice gratefully received

php code

$issearch = $_get['search'];  $querystring_results_empty = ""; if (!empty($_server['query_string'])) {   $params = explode("&", $_server['query_string']);   $newparams = array();   foreach ($params $param) {     if (stristr($param, "pagenum_results_empty") == false &&          stristr($param, "totalrows_results_empty") == false) {       array_push($newparams, $param);     }   }   if (count($newparams) != 0) {     $querystring_results_empty = "&" . htmlentities(implode("&", $newparams));   } } $querystring_results_empty = sprintf("&totalrows_results_empty=%d%s", $totalrows_results_empty, $querystring_results_empty); 

link recordset paging code

<?php if ($pagenum_results_empty < $totalpages_results_empty) { // show if not last page ?>         <a href="<?php printf("%s?pagenum_results_empty=%d%s", $currentpage, min($totalpages_results_empty, $pagenum_results_empty + 1), $querystring_results_empty); ?>">         <img src="images/arrow-next.png" width="58" height="97" alt=""/>         </a>         <?php }?> 

try this:

str_replace('search=no','search=yes',$_server['query_string']);