A simple universal paging class written by myself

I personally learned a simple paging class written in PHP, which has strong versatility.

/**
* Simple paging class
* @author:phpprince
* @QQ: 8923052
* @date: 2014-04-22 21:08:35
*/
class Page{
 protected $url; //Address
 protected $allnum; //Total number of records
 protected $current; //Current page number
 protected $pagesize; //How many records are displayed on each page
 protected $postfix; //Suffix
 protected $style; //There are 3 display styles, 1 2 3 respectively means the first 5 and the last 4, the first 3 and the last 3, and the first 4 Post 4

 public function __construct($url,$allnum,$current,$pagesize=10,$postfix='',$style=1){
 $this->url=$url;
 $this-> ;allnum=$allnum;
 $this->current=$current;
 $this->pagesize=$pagesize;
 $this->postfix=$postfix;
 $this->style=$style;
 }

 //Get the total number of pages
 protected function maxPageNum(){
 $max=ceil($this->allnum/$this->pagesize);
 //Page number over limit correction
 if($this ->current>$max){
 $this->current=$max;
 }
 if($this->current<1){
 $this->current=1;
 }
 return $ max;
 }

 //Get the complete html of the first page link str
 protected function firstUrl(){
 if($this->current!=1)
 {
 return 'Homepage';
 }else{
 return 'Homepage';
 }
 }

 //Get the complete html of the previous page link str
 protected function prevUrl() {
 if($this->current<=1){
 $fullurl='previous page';
 }else{
 $fullurl=$this->url.($this->current-1).$this->postfix;
 $fullurl='Previous page';
 }
 return $fullurl;
 }

 //Get next One page link complete html str
 protected function nextUrl(){
 if($this->current>=$this->maxPageNum()){
 $fullurl='< ;a>Next page';
 }else{
 $fullurl=$this->url.($this->current+1).$this->postfix ;
 $fullurl='Next page';
 }
 return $fullurl;
 }

 //Get the complete html of the last page link str
 protected function lastUrl(){
 if($this->current>=$this->maxPageNum( )){
 $fullurl='lastpage';
 }else{
 $fullurl=$this->url .$this->maxPageNum().$this->postfix;
 $fullurl='Last page';
 }
 return $fullurl;
 }

 //Get the complete url of the specified page number
 protected function getUrl($pageno){
 return $this- >url.$pageno.$this->postfix;
 }

 //Specify the display style
 protected function getStyle(){
 switch($this->style){
 case 1:
 $before=5 ;
 $after=4;
 break;
 case 2:
 $before=3;
 $after=3;
 break;
 case 3:
 $before=4;
 $after=4;
 break;
 default :
 $before=5;
 $after=4;
 }

 return array($before,$after);
 }

 //Get the intermediate URL 1 2 3 4 5 ⑥ 7 8 9 10
 protected function getMiddelUrl (){
 $max=$this->maxPageNum(); //Get the total page first to correct the current page overrun problem
 $current=$this->current; //The current page number must be legal to ensure The following page number range must be correct
 //Get the current style
 list($before,$after)=$this->getStyle();
 $startno=$current-$before; //Start page number
 $endno= $current+$after; //End page number

 //To ensure that the output always meets the requirements, if the starting page increases, the end page must increase, and vice versa.
 while($endno>$ max||$startno<1){
 if($endno>$max){ //The end page number is out of bounds
 $endno--;
 if($startno>1){
 $startno--;
 }
 }
 if($startno<1){ //The starting page number is out of bounds
 $startno++;
 if($endno<$max){
 $endno++;
 }
 }
 }
 $str=''; //Use To save the entire html str
 for($i=$startno;$i<=$endno;$i++){
 $currenturl=$this->getUrl($i);
 if($i!=$current) {
 $str.="{$i}";
 }else{
 $str.=''.$i.'';
 }
 }
 return $str;
 }

 //Return the complete paging html string
 public function getPageStr() {
 $str=''.$this->firstUrl().$this->prevUrl();
 $str.=$this->getMiddelUrl();
 $str.=$this->nextUrl().$this->lastUrl().'total'.$this->maxPageNum().'page'. $this->allnum.'bar

Copy code