php简单分页类实现方法

class PageModel {?
??? /**
???? * 获取分页数组
???? * @param unknown $page 当前页面数
???? * @param unknown $goodsCount 商品总数
???? * @param unknown $pageLength 每个页面展示页面数
???? */?
??? public static function getPageArr($page,$goodsCount,$pageCountLength,$pageLength) {?
??????? //页面总数?
??????? $allPageCount = ceil($goodsCount / $pageLength);?
?????? //如果页面总是比长度短,设定页面长度为页面总数?
?????? if ($allPageCount <= $pageCountLength) {?
?????????? $allPageCount = ceil($goodsCount / $pageLength);?
?????? }?
??????? //总页面数一页展示完?
??????? if ($allPageCount <= $pageCountLength) {?
??????????? for ($i = 0; $i < $allPageCount; $i ++) {?
??????????????? $arr[] = array('page' => $i + 1);?
??????????? }?
??????????? return $arr;?
??????? }?
??????? //前后的长度?
??????? $halfLength = floor($pageCountLength / 2);?
??????? //因为太小,所以放原来位置,左边?
??????? if ($page <= $halfLength) {?
??????????? $arr = array();?
??????????? for ($i = 0; $i < $pageCountLength; $i ++) {?
??????????????? $arr[] = array('page' => $i + 1);?
??????????? }?
??????????? return $arr;?
??????? }?
??????? //太大,只取到边缘,超出也只取到边缘?
??????? if ($page > $allPageCount - floor($pageCountLength / 2)) {?
??????????? for ($i = -$pageCountLength; $i < 0; $i ++) {?
??????????????? $arr[] = array('page' => $allPageCount + $i + 1);?
??????????? }?
??????????? return $arr;?
??????? }?
??????? //中间的数,把中间的取出来?
??????? for ($i = -$halfLength; $i < $pageCountLength - $halfLength; $i ++) {?
??????????? $arr[] = array('page' => $page + $i);?
??????? }
??????? return $arr;
??? }
}