如何在php中回显最后几个数组？

I've seen an example for echoing the very last element in an array, but how do I echo the last 3 to 4 items in PHP?

我已经看到了回显数组中最后一个元素的示例,但是如何回显PHP中的最后3到4个项目?

I want to echo in REVERSE order, so the screen would show item 10, item 9, item 8 in an array of 10 items. I will not know the number of items in the array.

我想以REVERSE顺序回显,因此屏幕将在10个项目的数组中显示项目10,项目9,项目8。我不知道数组中的项目数。

Here's my progress so far, but I know I'll need a loop or something. Thanks in advance.

到目前为止,这是我的进展,但我知道我需要一个循环或其他东西。提前致谢。

<?php

$comments = file_get_contents('comments.txt');
$array = explode("~",$comments);

for...

?????

echo $item;

?>

3 个解决方案

#1

You can try array_reverse

你可以尝试array_reverse

<?php
$a=[1,2,3,4,5];
$array = array_reverse($a);
for($i=0;$i<4;$i++){//4 is the number of elements you wish to print.
 echo "{$array[$i]}\n";
}

#2

You can slice the first three off of the reversed array:

您可以将反转数组的前三个切片:

$result = array_slice(array_reverse($array), 0, 3);

foreach($result as $val) {
    echo $val;
}

#3

I think, you can reverse your array i.e. $array..array_reverse() function will be useful for this.

我想,你可以反转你的数组,即$ array..array_reverse()函数对此有用。

And once you have reversed $array...then you can run a loop on it and print the desired number of elements.

一旦你颠倒了$ array ...那么你可以在它上面运行一个循环并打印所需数量的元素。

#1