Multi-Page Search Navigation

//Sorry the tabs are off. I use TextPad and some of my stuff here 
//seems to be formatted weird.

<?php



class PageNavigation {

	/* Global Variables */

	//----------------------------------

	var $totalResults;		//Total results returned from query
	var $resultsPerPage;	//How many search items will be displayed per each page
	var $page;				//The current page we are showing
	var $pages;				//Total pages - determined by $totalResults and $resultsPerPage
	var $startHTML; 		//Example: "Showing Page 1 of 5: Go to Page: "
	var $appendSearch; 		//Example: "&a=1&b=2" - if you have other get vars that need to be shown besides &page=
	var $range; 			//How many numbers will be shown - plus and minus of the page we are on
	var $link_on;			//Example: "<a href='testpage.php'><b>6</b></a>" - notice bold
	var $link_off;			//Example: "<a href='testpage.php'>6</a>" - without bold
	var $back;				//Example: "<a href='1.php'>FIRST</a>" - first page
	var $forward;			//Example: "<a href='50.php'>LAST</a>" - last page


	var $product;			//The final result





	/* String Aliases */

	//----------------------------------

	//  While the product is being built, there will be alias variables that we will do a search/replace for
	//  Example: "&page={page}"; where {page} might become "1"

	//	Here are the allowed aliases

	//  {page} will become $page					//global var
	//	{pages} will become $pages					//global var
	//  {num} will become $num						//local var
	//	{appendSearch} will become $appendSearch	//global var




	//----------------------------------


	/****************************************
	*                                       *
	*	Constructor                         *
	*                                       *
	*****************************************/

	function PageNavigation($totalResults, $resultsPerPage, $page, $startHTML, $appendSearch, $range, $link_on, $link_off, $back, $forward) {

		$this->totalResults = 		$totalResults;
		$this->resultsPerPage = 	$totalResults;
		$this->page = 				$page;
		$this->pages = 				ceil($totalResults / $resultsPerPage);

									// Example of $startHTML: "Showing Page {page} of {pages}: Go to Page:"
		$this->product = 			$startHTML;
		$this->appendSearch = 		$appendSearch;
		$this->range = 				$range;
		$this->link_on = 			$link_on;
		$this->link_off = 			$link_off;
		$this->back = 				$back;
		$this->forward = 			$forward;


	}

	/****************************************
	*                                       *
	*	Replace Alias                       *
	*                                       *
	*****************************************/

	function replace_alias() {

		//  {page} = $page					//global var
		//	{pages} = $pages				//global var
		//	{appendSearch} = $appendSearch	//global var

		$this->product = str_replace("{page}", $this->page, $this->product);
		$this->product = str_replace("{pages}", $this->pages, $this->product);
		$this->product = str_replace("{appendSearch}", $this->appendSearch, $this->product);

	}


	/****************************************
	*                                       *
	*	GET HTML                            *
	*                                       *
	*****************************************/

	function getHTML() {

		//array of html links for each number
		$pageLinks = array();

		//loop array of needed pages
		for ($i=0;$i<$this->pages;$i++) {

			//This is the current number we are on
			$num = $i+1;

			//Is this page within our 'range'
			$showNum = false;

			if ($this->page >= $num && $this->page - $this->range <= $num)
				$showNum = true;


			if ($this->page <= $num && $this->page + $this->range >= $num)
				$showNum = true;


			if ($showNum == true) {
				if (($num) == $this->page) {
					array_push($pageLinks, str_replace("{num}", $num, $this->link_on));
				} else {
					array_push($pageLinks, str_replace("{num}", $num, $this->link_off));
				}
			}

		}



		//Determine if we need BACK link
		if (($this->page - $this->range) > 1)
			$this->product .= $this->back;

		//Turn array of html numbre-links into one string
		$this->product .= implode(" | ",$pageLinks);

		//Determine if we need FORWARD link
		if (($this->page + $this->range) < $this->pages)
			$this->product .= $this->forward;



		//Do Replacements
		$this->replace_alias();


		//Return Final Product
		return $this->product;


	}







/****************************************
*                                       *
*	END CLASS                           *
*                                       *
*****************************************/
}




?>


//*********************
//*********************
//**  EXAMPLE OF USE  ****
//*********************
//*********************


<?php

include("PageNavigation.php");

$totalResults		= 200;
$resultsPerPage		= 5;
$page				= $_GET[page];
$startHTML			= "<b>Showing Page {page} of {pages}</b>: Go to Page ";
$appendSearch		= "&a=1&b=2";
$range				= 5;
$link_on			= "<a href='test.php?page={num}{appendSearch}'><b>{num}</b></a>";
$link_off			= "<a href='test.php?page={num}{appendSearch}'>{num}</a>";
$back				= " <a href='test.php?page=1{appendSearch}'><<</a> ";
$forward			= " <a href='test.php?page={pages}{appendSearch}'>>></a> ";

$myNavigation = New PageNavigation($totalResults, $resultsPerPage, $page, $startHTML, $appendSearch, $range, $link_on, $link_off, $back, $forward);

echo $myNavigation->getHTML();

?>