PHP Paging Pager Page class implementation

<?PHPDefine(' ACC ') | |Exit(' Permision Denied '); //total number of bars $total//page $perpage//Total pages $cnt = ceil ($total/$perpage); Division, rounding up//page page display (page-1) * $perpage + 1 ~ ~ ~ page* $perpage//c.php//c.php?cat_id = 3//c.php?cat_id =3 $page = 1//pag E parameters, should be based on the page number to generate, but also can not throw other parameters//first get the Address bar and save classpagetool{protected $total= 0; protected $perpage= 10; protected $page= 1;  Public function__construct ($total,$page=false,$perpage=false){        $this->total =$total; if($perpage){            $this->perpage =$perpage; }        if($page){            $this->page=$page; }    }     //main Functions     Public functionShow () {$cnt=Ceil($this->total/$this->perpage);//Get Total Pages        $url= ($_server[' Request_uri ']); $parse=Parse_url($url);//Separate path query two array type//print_r ($parse); Talk param split the group        $param=Array(); if(isset($parse[' Query '])){            Parse_str($parse[' Query '],$param); }        //Print_r ($param); Regardless of whether the $param array has a page element, it is unset to save the page element except the page        unset($param[' Page ']); //Print_r ($param); Next key, calculate page navigation                $url=$parse[' Path ']. '? '; if(!Empty($param)){            $param=Http_build_query($param); $url=$url.$param.‘ & '; Echo $url, "<br/>"; }        //Calculate page Navigation        $nav=Array(); $nav[] = ' <span class= ' page_now ' > '.$this->page. ' </span> ';  for($left=$this->page-1,$right=$this->page+1;($left>=1 | |$right<=$cnt) &&Count($nav) <=5 ;){            if($left>= 1){                Array_unshift($nav, ' <a href= '.$url.‘ Page= '.$left.‘" >['.$left.‘] </a> ');//put to the beginning of the array                $left--; }            if($right<=$cnt){                Array_push($nav, ' <a href= '.$url.‘ Page= '.$right.‘" >['.$right.‘] </a> ');//put it at the end of the array                $right++; }        }        //Print_r ($NAV); View Source Code        return implode(‘‘,$nav); } }//$p = NEW pagetool (50,2,6); Total 50 items, currently 2nd page, each page 6 item//print_r ($p->show ());  Paged class call Test//new Pagetool (total number of bars, current page, number of bars per page);//echo $p->show (); return pagination Code $page=isset($_get[' Page ']) ?$_get[' Page ']: 1;$p=NEWPagetool (50,$page, 6);//Total 50 items, currently 2nd page, 6 item per pageEcho $p-Show (); ?>

Click on page 6th and 7th, respectively, and the test results are as follows:

PHP Paging Pager Page class implementation