PHP paginator program code_PHP tutorial-PHP Tutorial-php.cn

PHP paginator program code_PHP tutorial

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Release： 2016-07-13 10:43:54

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This article will introduce to you a PHP paging program code for paginator. Friends in need can enter it for reference.

The code is as follows

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class paginator {

Function __construct () {

}

static function render($page_type, array $args = array()) {
          $html = '';
switch ($page_type)
                                                                            case '1':
                      $html = page_1($channel_code, $page_num, $cur_page, $per_group, $base_url, $n, $v);
break;
case '2':
$html = fpage($row_num, $pagesize, $page, $url);
break;
case '3':
break;

                  default:
$html = page($num, $perpage, $curpage, $mpurl, $hiddenFrom='');
          }

          return $html;
}

//Function 1: Generate paging navigation based on the total number of pages, current page, page grouping and url
Function page_1($channel_code, $page_num, $cur_page, $per_group, $base_url, $n, $v) {
//Paging function parameter list (how many pages, current page, how many per page, link address)
           $base_url .= strpos($base_url, '?') ? '&' : '?'; //If there is ?, add &, otherwise add ?

          $page_val = "";

If ($page_num < 1) {
                return $page_val; //If less than 1, return empty
            } elseif ($page_num == 1) {
                 return $page_val = 1; //If equal to 1, return 1
          }

//Group

          $group_ok = !(($page_num-1) % ($per_group-1)); //No remainder
// Calculate how many groups there are in total
If($group_ok) {
                $group_num = ($page_num-1)/($per_group-1);
          }else {
$group_num = ceil(($page_num-1) / ($per_group-1));
              } //Determine whether the current page is the last one in a group

//Number of groups
           $is_last_page = !(($cur_page-1) % ($per_group-1)); //Calculate the number of groups currently in
If ($is_last_page) {
$cur_group = ($cur_page-1) / ($per_group-1) + 1;
         } else {
                $cur_group = ceil(($cur_page-1) / ($per_group-1));
          }

// Calculate the displayed starting page, this key
$from = ($cur_group - 1) * ($per_group-1) + 1;
           $from = $cur_group <= 1 ? 1 :$from;

          $to = $from + $per_group;
$to = $to > $page_num ? $page_num + 1 : $to;

for($a = $from; $a < $to; $a++) {
If ($a != $cur_page) {

//Not the current page
$page_val .= '

' . $a . '

';
} else {
//Current page
$page_val .='

'. $a .'

';
               }
          }

//Previous pageNext pageHome pageLast page
$ Next = $ Cur_page + 1; // The current page +1
          $prev = $cur_page-1; //Current page-1

If ($cur_page != $page_num) {
//The current page is not the last page
$page_val .= '' . 'Next page' . '';
$page_val .= '' . '>>' . ''; //Last page

          }
If ($cur_page != 1){

//Not the first page, add the previous content
$page_val = '' . 'Previous page' . '' . $page_val;
$page_val = ' ' . '<<' . '' . $page_val; //Homepage

          }
           $page_val = '

'.$page_val.'';

          return $page_val;
}

// Function 2: Divide pages into pages based on the number of records, page list, current page, and url year
Function fpage($row_num, $pagesize, $page, $url) {
//$page, current page; $row_num total number of records; $pagesize: number of records per page; $url record page;
//If, if there is a calculation, add 1
$page_count = $row_num % $pagesize?intval($row_num / $pagesize) + 1:intval($row_num / $pagesize);

If ($page_count == 1) {
                $page_string = "First page|Previous page|Next page|Last page";
         } else {
//If there is more than one page
If ($page == 1) {
//The first page displays
$page_string = " First page|Previous page| Next page| Last page";
                                                             If (($page > 1) and ($page < $page_count)) {
$page_string = " First page| Previous page| Next page| Last page";
                                                             If ($page == $page_count) {
$page_string = " First page| Previous page|Next page| Last page";
                                                                       }
$page_str = $page_string . ("," . $page . "/" . $page_count . "page");
echo "

" . $page_str . "

";
}

/**
*Paging function
*
* @param int $num: total number of records
* @param int $perpage: records per page
* @param int $curpage: current page
* @param string $mpurl: path url
* @param unknown_type $hiddenFrom
* @return string
*/
Function page($num, $perpage, $curpage, $mpurl,$hiddenFrom='') {
          $multipage = '';
//Restore
            $mpurl .= strpos($mpurl, '?') ? '&' : '?';

If($num > $perpage) {
$page = 10;
$offset = 2;

                $pages = @ceil($num / $perpage); //Total number of pages

If($page > $pages) {
$from = 1;
                     $to = $pages;
                } else {
//If the total number of pages>10
$from = $curpage - $offset; //Current page-2
$to = $from + $page - 1; //Current page +10-3

If($from < 1) {

$to = $curpage + 1 - $from;
$from = 1;
if($to - $from < $page) {
$to = $page;
}
} elseif($to > $pages) {
                    $from = $pages - $page + 1;
                    $to = $pages;
                }
            }

            if ($hiddenFrom) {
                $multipage = ($curpage - $offset > 1 && $pages > $page ? '首页 ' : '').
                ($curpage > 1 ? ' ‹‹上一页 ' : '');
                for($i = $from; $i <= $to; $i++) {
                    $multipage .= $i == $curpage ? ''.$i.' ' :
                    ''.$i.' ';
                }

                $multipage .= ($curpage < $pages ? '下一页››' : '').
                ($to < $pages ? ' 末页' : '');
                $multipage = $multipage ? '

'.$multipage.'

' : '';
            } else {

                $multipage = ($curpage - $offset > 1 && $pages > $page ? '首页 ' : '').
                ($curpage > 1 ? ' ‹‹上一页 ' : '');

                for($i = $from; $i <= $to; $i++) {
                    $multipage .= $i == $curpage ? ''.$i.' ' :
                    ''.$i.' ';
                }

                $multipage .= ($curpage < $pages ? '下一页››' : '').
                ($to < $pages ? ' 末页' : '');
                $multipage = $multipage ? '

'.$multipage.'

' : '';
            }
        }
        return $multipage;
    }
    //暂不用
    function page_get_start($page, $ppp, $totalnum) {
        $totalpage = ceil($totalnum / $ppp);
        $page = max(1, min($totalpage, intval($page)));
        return ($page - 1) * $ppp;
    }
    //暂不用
    function js_page($hiddenFrom,$page)
    {
        if ($hiddenFrom) {
            return ' onclick=javascript:$("#page").val("'.$page.'");$("#'.$hiddenFrom.'").submit(); ';
        }
    }
}

?>