Array Pagination Demo

[edwardp]

I have been searching with regards to pagination for my own site especially array data. I have developed this single page script that generates some data into an arryay and then enables the user to page through it. It only has a next and previous controls and wouldnt be difficult to amend for your own use. What do you reckon??

//page.php
<?
session_start();//start session for this page
if(isset($_SESSION['arrayData'])){
	//instantiate variables
	$currentpage = isset($_GET['pagenum']) ? (integer)$_GET['pagenum'] : 0;
	$numperpage = 10; //number of records per page
	$numofpages = count($_SESSION['arrayData'])/$numperpage; //total num of pages
	$first = 0; //first page
	$last = $numofpages;

if($currentpage==0){ //which page is previous
	$previous = 0; //if very first page then previous is same page
}else{
	$previous = $currentpage-1;
}

if($currentpage==$last-1){//which page is last
	$next = $currentpage;
}else{
	$next = $currentpage+1;
}

for($x=($currentpage*10);$x<(($currentpage*10)+10);$x++){ //output data
	echo ($x+1)." ".$_SESSION['arrayData'][$x]."<br>";
}
echo "<a href='page.php?pagenum=".$previous."'>Previous</a>						<a href='page.php?pagenum=".$next."'>Next</a>"; //hyperlinks controls
}else{
	for($x=0;$x<10000;$x++){ //fill array data
		$arrayData[$x] = ($x*10)+$x;
	}
	session_register(arrayData); //register it with session
	echo "<META HTTP-EQUIV=refresh content=\"0; URL='page.php'\">"; //forward to next page
}
?>

[xuroq]

it looks like it should work. Do you have the array data so I can see how you have laid it out, as I am currently working on something similar
thanks

[Weedpacket]

edwardp wrote:

session_register(arrayData); //register it with session

This is broken in more than one way (using session_register, and not quoting string literals). You mean

$_SESSION['arrayData'] = $arrayData;

//register it with session

xuroq wrote:

Do you have the array data so I can see how you have laid it out, as I am currently working on something similar

That's already in the code:

for($x=0;$x<10000;$x++){ //fill array data
        $arrayData[$x] = ($x*10)+$x;
    } 

[foyer]

I loaded your script onto my server and I had some issues with it. There isn't a whole lot of checking to see if pages even exist. I think it also assumes how many items are in the array. One more thing, if you added an odd amount of data it wouldn't show it all. I rewrote it though based off some code I use, added a few things to it. Try it out, take a look at how it works.

//page.php

<?
session_start();//start session for this page

$array = $_SESSION['arrayData'];
$page = $_REQUEST['pagenum'];

$currentpage = isset($page) ? (integer)$page : 1;
$numperpage = 10; //number of records per page

$total = count($_SESSION['arrayData']);
$numofpages = ceil($total / $numperpage); //total num of pages, oh yeah don't forget to round up

if(isset($array)){
	if (($currentpage > 0) && ($currentpages <= $numofpages)) {
		//yes pages are required and current page is ok

	//show data array
	$start = ($currentpage-1) * $numperpage;
	for($i=$start;$i<=($numperpage+$start-1);$i++) {
		if (isset($array[$i]))
		echo $array[$i] .'<br />';
	}

	if ($currentpage != 1) {//can't go back from page 1
		$previous_page = $currentpage - 1;
		$previous = '<a href="page.php?pagenum='. $previous_page .'"><< Previous</a> ';	
	}	

	$pages_html = ' Pages: ';
	for ($a=1; $a<=$numofpages; $a++) {
		if ($a == $currentpage) {
			$pages_html .= $a .'</u>, ';
		} else {
			$pages_html .= '<a href="page.php?pagenum='. $a .'" >'. $a .'</a>, ';
		}
	}
	$pages_html = substr($pages_html,0,-2); //remove the last ,

	if ($currentpage != $numofpages) {//can't go forward if we are on the last page
		$next_page = $currentpage + 1;
		$next = ' <a href="page.php?pagenum='. $next_page .'">Next >></a>';
	}

	echo '<br /><br />'. $previous . $pages_html . $next; //hyperlinks controls
}

if (isset($_REQUEST['destroy']))
	session_destroy();
}else{
	$arrayData = array();
    for($x=0;$x<104;$x++){ //fill array data
        $arrayData[] = "number: $x";
    }
    $_SESSION['arrayData'] = $arrayData; //register it with session
	header("Location: {$_SERVER['PHP_SELF']}");
}
?>

[xuroq]

thanks very much for the code works well. Could you tell me how I could adapt it to put the content on my site (http://xuroq.co.uk) into different pages

Thanks

[xuroq]

could anyone advise me on what these bits of code mean

$array = $_SESSION['arrayData'];

and where do I get the arrayData from

and

    $_SESSION['arrayData'] = $arrayData; 
    header("Location: {$_SERVER['PHP_SELF']}"); 

Thanks

[laserlight]

xuroq, you may want to start a thread in another forum. This forum is intended for code critique.