IXNA

工作经常会用到的一个分页类..记录一下.

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/** Example: $page = (isset($this->params[named][page])) ? $this->params[named][page] : 1; // 导入分页类 App::import(Vendor, page_class); // 获取公告总数 $total = $this->Bulletin->getBulletinTotal(); $perpage = ITEMPREPAGE; $offset = $perpage * ($page - 1); $pagebar = new Pagebar($total, $page, $offset, $perpage); $pagenav = $pagebar->construct_page_nav($total, $page, SYSTEMURL . /bulletins/index, null, null); */ perpage = $perpage; $numpages = ceil($numresults / $this->perpage); if ($numpages == 0) { $numpages = 1; } if ($page < 1) { $page = 1; } else if ($page > $numpages) { $page = $numpages; } $limitlower = ($page - 1) * $this->perpage; $limitupper = ($page) * $this->perpage; if ($limitupper > $numresults) { $limitupper = $numresults; if ($limitlower > $numresults) { $limitlower = ($numresults - $this->perpage) - 1; } } if ($limitlower < 0) { $limitlower = 0; } } /** * Returns the HTML for multi-page navigation * * @param integer Total number of items found * @param integer Page number being displayed * @param string Base address for links eg: q.php?t=99{&page=4} * @param string Ending portion of address for links * * @return string Page navigation HTML */ function construct_page_nav($results, $pagenumber, $address, $address2 = , $option = array()) { $perpage = $this->perpage; $show = array(); $curpage = 0; $pagenav = ; $firstlink = ; $prevlink = ; $lastlink = ; $nextlink = ; if ($results <= $perpage) { $show[pagenav] = false; return ; } $show[pagenav] = true; $total = number_format($results); $totalpages = ceil($results / $perpage); $show[prev] = false; $show[next] = false; $show[first] = false; $show[last] = false; if ($pagenumber > 1) { $prevpage = $pagenumber - 1; $prevnumbers = $this->fetch_start_end_total_array($prevpage, $perpage, $results); $show[prev] = true; } if ($pagenumber < $totalpages) { $nextpage = $pagenumber + 1; $nextnumbers = $this->fetch_start_end_total_array($nextpage, $perpage, $results); $show[next] = true; } // create array of possible relative links that we might have (eg. +10, +20, +50, etc.) $pagenavsarr = array(10, 50, 100, 500, 1000); $pagenavpages = 5; while ($curpage++ < $totalpages) { if (abs($curpage - $pagenumber) >= $pagenavpages AND $pagenavpages != 0) { if ($curpage == 1) { $firstnumbers = $this->fetch_start_end_total_array(1, $perpage, $results); $show[first] = true; } if ($curpage == $totalpages) { $lastnumbers = $this->fetch_start_end_total_array($totalpages, $perpage, $results); $show[last] = true; } // generate relative links (eg. +10,etc). if (in_array(abs($curpage - $pagenumber), $pagenavsarr) AND $curpage != 1 AND $curpage != $totalpages) { $pagenumbers = $this->fetch_start_end_total_array($curpage, $perpage, $results); $relpage = $curpage - $pagenumber; if ($relpage > 0) { $relpage = + . $relpage; } $pagenav .= " $curpage "; } } else { if ($curpage == $pagenumber) { $numbers = $this->fetch_start_end_total_array($curpage, $perpage, $results); $pagenav .= " $curpage "; } else { $pagenumbers = $this->fetch_start_end_total_array($curpage, $perpage, $results); $pagenav .= " $curpage "; } } } $pagenav = " ".(($show[prev]) ? ("上一页") : ("上一页"))." $pagenav ".(($show[next]) ? ("下一页") : ("下一页"))." 第 $pagenumber / $totalpages 页,共 $total条记录"; return $pagenav; } /** * Returns an array so you can print Showing results $arr[first] to $arr[last] of $totalresults * * @param integer Current page number * @param integer Results to show per-page * @param integer Total results found * * @return array In the format of - array(first => x, last => y) */ function fetch_start_end_total_array($pagenumber, $perpage, $total) { $first = $perpage * ($pagenumber - 1); $last = $first + $perpage; if ($last > $total) { $last = $total; } $first++; return array(first => number_format($first), last => number_format($last)); } } ?>