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A simple universal paging class written by myself

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Release： 2016-07-25 08:47:57

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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

return $str;

}

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