Php 计算for循环的偏移量

我正在尝试对我得到的一个数组进行分页，目前我正在使用类似这样的for循环遍历它

for$i=$pages->low；$i
它会发出讣告，但会限制物品的总数

虽然我个人会在这里简单地使用

从Kohana的分页模块：

$this->total_pages        = (int) ceil($this->total_items / $this->items_per_page);
$this->current_page       = (int) min(max(1, $this->current_page), max(1, $this->total_pages));
$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
$this->current_last_item  = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
$this->previous_page      = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
$this->next_page          = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
$this->first_page         = ($this->current_page === 1) ? FALSE : 1;
$this->last_page          = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
$this->offset             = (int) (($this->current_page - 1) * $this->items_per_page);

$this->total\u pages=（int）ceil（$this->total\u items/$this->items\u per\u page）；
$this->current_page=（int）min（max（1，$this->current_page），max（1，$this->total_page））；
$this->current\u first\u item=（int）min（（$this->current\u page-1）*$this->items\u per\u page）+1$this->total\u items）；
$this->current\u last\u item=（int）min（$this->current\u first\u item+$this->items\u per\u page-1，$this->total\u items）；
$this->previous\u page=（$this->current\u page>1）？$this->current\u page-1:FALSE；
$this->next_page=（$this->current_page<$this->total_page）？$this->current_page+1:FALSE；
$this->first\u page=（$this->current\u page==1）？FALSE:1；
$this->last\u page=（$this->current\u page>=$this->total\u page）？FALSE:$this->total\u page；
$this->offset=（int）（（$this->current\u page-1）*$this->items\u per\u page）；
不清楚，为什么如果第一页上有13个项目，那么总数应该等于5

对我来说，如果你想在第2页上显示$pages->ipp下一项，只需从$pages->low转到$pages->low+$pages->ipp
，这就是小学数学。你确定你能在没有基本算术的情况下编程吗？那太完美了（极限迭代器），比我以前使用的延迟for循环要好得多。
$total = min($pages->ipp * ($pages->current_page + 1), $pages->total_items);

$start_from = ($current_page - 1) * $per_page;

$this->total_pages        = (int) ceil($this->total_items / $this->items_per_page);
$this->current_page       = (int) min(max(1, $this->current_page), max(1, $this->total_pages));
$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
$this->current_last_item  = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
$this->previous_page      = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
$this->next_page          = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
$this->first_page         = ($this->current_page === 1) ? FALSE : 1;
$this->last_page          = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
$this->offset             = (int) (($this->current_page - 1) * $this->items_per_page);