php paging function sample code to share

Share an example of php paging function code, using this function to implement paging code is good.

Code, php paging function.

<?php
/*
* Created on 2011-07-28
* Author : LKK , http://lianq.net
*  Usage: 
require_once('mypage.php');
$result=mysql_query("select * from mytable", $myconn);
$total=mysql_num_rows($result);    // Total amount of information obtained 
pageDivide($total,10);     // Call the paging function 
// Database operation 
$result=mysql_query("select * from mytable limit $sqlfirst,$shownu", $myconn);
while($row=mysql_fetch_array($result)){
... Your operating 
}
echo $pagecon;    // Output paging content 
*/
if(!function_exists("pageDivide")){
#$total      The total number of information 
#$shownu     According to the number of , The default 20
#$url      Links on this page 
function pageDivide($total,$shownu=20,$url=''){
#$page  The current page number 
#$sqlfirst mysql Database start entry 
#$pagecon     Paging content 
global $page,$sqlfirst,$pagecon,$_SERVER;
$GLOBALS["shownu"]=$shownu;
if(isset($_GET['page'])){
$page=$_GET['page'];
}else $page=1;
# if $url Use the default , The null value , Assign the value to this page URL
if(!$url){ $url=$_SERVER["REQUEST_URI"];}
#URL Analysis of the 
$parse_url=parse_url($url);
@$url_query=$parse_url["query"];    // Take it out in the question mark ? After the content 
if($url_query){
$url_query=preg_replace("/(&?)(page=$page)/","",$url_query);
$url = str_replace($parse_url["query"],$url_query,$url);
if($url_query){
$url .= "&page";
}else $url .= "page";
}else $url .= "?page";
# The page number to calculate 
$lastpg=ceil($total/$shownu);    // The last page , Total number of pages 
$page=min($lastpg,$page);
$prepg=$page-1; // on 1 page 
$nextpg=($page==$lastpg ? 0 : $page+1); // Under the 1 page 
$sqlfirst=($page-1)*$shownu;
# Begin paging content 
$pagecon = " According to the first  ".($total?($sqlfirst+1):0)."-".min($sqlfirst+$shownu,$total)."  One record, total  <B>$total</B>  records ";
if($lastpg<=1) return false;    // If only 1 Page is out of 
if($page!=1) $pagecon .=" <a href='$url=1'> Home page </a> "; else $pagecon .="  Home page  ";
if($prepg) $pagecon .=" <a href='$url=$prepg'> Previous page </a> "; else $pagecon .="  Previous page  ";
if($nextpg) $pagecon .=" <a href='$url=$nextpg'> After the page </a> "; else $pagecon .="  After the page  ";
if($page!=$lastpg) $pagecon.=" <a href='$url=$lastpg'> back </a> "; else $pagecon .="  back  ";
# Drop down the jump list , Loop through all page numbers 
$pagecon .=" To the first  <select name='topage' size='1' onchange='window.location=\"$url=\"+this.value'>\n";
for($i=1;$i<=$lastpg;$i++){
if($i==$page) $pagecon .="<option value='$i' selected>$i</option>\n";
else $pagecon .="<option value='$i'>$i</option>\n";
}
$pagecon .="</select>  Page,  $lastpg  page ";
}
}else die('pageDivide() A function of the same name already exists !');
?>