如何从数组进行分页?

问题描述

我有一个包含要分页显示的数据的数组.

I have an array with the data which I want to display with pagination.

$display_array = Array
(
    [0] => "0602 xxx2",
    [1] => "0602 xxx3",
    [2] => 5 // Total= 2+3
    [3] => "0602 xxx3",
    [4] => "0602 saa4",
    [5] => 7 // Total = 3+4
)

我尝试过这样的事情

function pagination($display_array, $page)
{   
    global $show_per_page;
    $page = $page < 1 ? 1 : $page;
    $start = ($page - 1) * $show_per_page;
    $end = $page * $show_per_page;
    for($i = $start; $i < $end; $i++)
    {
        ////echo $display_array[$i] . "<p>";
        // How to manipulate this?   
        // To get the result as I described below.
    }
}

我想做一个分页以获得这样的预期结果:

I want do a pagination to get the expected result like this:

如果我定义 $show_per_page = 2; 那么 pagination($display_array, 1); 输出:

If I define $show_per_page = 2; then pagination($display_array, 1); outputs:

0602 xxx2
0602 xxxx3
Total:5

和 paganation($display_array, 2); 输出:

0602 xxx3
0602 saa4
Total:7

如果我定义了 $show_per_page = 3;，那么 pagination($display_array, 1); 输出:

If I define $show_per_page = 3;, then pagination($display_array, 1); outputs:

0602 xxx2
0602 xxxx3
Total: 5 
0602 xxx3

和 paganation($display_array, 2); 输出:

0602 saa4
Total:7

如果我定义 $show_per_page = 4; 输出:

0602 xxx2
0602 xxxx3
Total:5
0602 xxx3
0602 saa4
Total: 7 

推荐答案

看看这个:

    function paganation($display_array, $page) {
        global $show_per_page;

        $page = $page < 1 ? 1 : $page;

        // start position in the $display_array
        // +1 is to account for total values.
        $start = ($page - 1) * ($show_per_page + 1);
        $offset = $show_per_page + 1;

        $outArray = array_slice($display_array, $start, $offset);

        var_dump($outArray);
    }

    $show_per_page = 2;

    paganation($display_array, 1);
    paganation($display_array, 2);


    $show_per_page = 3;
    paganation($display_array, 1);
    paganation($display_array, 2);

输出为:

// when $show_per_page = 2;
array
  0 => string '0602 xxx2' (length=9)
  1 => string '0602 xxx3' (length=9)
  2 => int 5
array
  0 => string '0602 xxx3' (length=9)
  1 => string '0602 saa4' (length=9)
  2 => int 7

// when $show_per_page = 3;
array
  0 => string '0602 xxx2' (length=9)
  1 => string '0602 xxx3' (length=9)
  2 => int 5
  3 => string '0602 xxx3' (length=9)
array
  0 => string '0602 saa4' (length=9)
  1 => int 7

$show_per_page = 3 的输出与您的不同，但我不确定您的期望是什么?您想获取剩下的所有内容(即0602 saa4"和7")以及前一个元素(即0602 xxx3")吗?

The output for $show_per_page = 3 is different than yours, but I'm not sure what you expect? You want to fetch everything that is left (i.e. '0602 saa4' and 7) plus one previous element (i.e. '0602 xxx3')?

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