PHP paging class source code and calling example

class Page {
 private $total; //Total records
 private $pagesize;//How many records are displayed on each page?
 private $limit; //limit
 private $page; //Current Page number
 private $pagenum; //Total page number
 private $url; //Address
 private $bothnum; //The amount of digital paging kept on both sides

 //Constructor method initialization
 public function __construct($_total, $_pagesize) {
 $this->total = $_total ? $_total : 1;
 $this->pagesize = $_pagesize;
 $this->pagenum = ceil($this->total / $this->pagesize );
 $this->page = $this->setPage();
 $this->limit = "LIMIT ".($this->page-1)*$this->pagesize." ,$this->pagesize";
 $this->url = $this->setUrl();
 $this->bothnum = 2;
 }

 //Interceptor
 private function __get($ _key) {
 return $this->$_key;
}

//Get the current page number
private function setPage() {
 if (!empty($_GET['page'])) {
if ($_GET ['page'] > 0) {
 if ($_GET['page'] > $this->pagenum) {
 return $this->pagenum;
 } else {
 return $_GET['page '];
 }
} else {
 return 1;
}
 } else {
return 1;
 }
 }

//Get address
private function setUrl() {
 $_url = $_SERVER["REQUEST_URI" ];
 $_par = parse_url($_url);
 if (isset($_par['query'])) {
parse_str($_par['query'],$_query);
unset($_query['page ']);
$_url = $_par['path'].'?'.http_build_query($_query);
 }
 return $_url;
 } //Digital directory
 private function pageList() {
 for ($ i=$this->bothnum;$i>=1;$i--) {
$_page = $this->page-$i;
if ($_page < 1) continue;
$_pagelist . = ' '.$_page.' ';
 }
 $_pagelist .= ' '.$this->page.' ';
 for ($i=1;$i<=$this->bothnum;$i++) {
$_page = $this->page+$i;
if ($_page > $this->pagenum) break;
$_pagelist .= ' '.$_page.' ';
 }
 return $_pagelist;
 }

 //Homepage
 private function first() {
 if ($ this->page > $this->bothnum+1) {
return ' 1 ...';
 }
 }

 //Previous page
 private function prev() {
 if ($this->page == 1) {
return 'Previous page';
 }
 return ' Previous page ';
 return ' Next page ';
 }

 //Last page
 private function last() {
 if ($this->pagenum - $this->page > $this-> bothnum) {
return ' ...'.$this->pagenum.'  ';
 }
 }

 //Paging information
 public function showpage() {
 $_page .= $this->first();
 $_page .= $this->pageList( );
 $_page .= $this->last();
 $_page .= $this->prev();
 $_page .= $this->next();
 return $_page;
 }
 }
?>

2, paging class call:

$_page = new Page($_total,$_pagesize); //$_total is the total number of items in the data set, $_pagesize is the number displayed on each page.
?>