数组到无序列表 [英] Array to an unordered list

问题描述

我正在尝试将一些数组值映射到一个无序 () 列表.

I'm trying to map some arrays values to an unordered () list.

    <?php
            $files = scandir($dir);
            //remove "." and ".."
            print_r($files);
    ?>

    <ul>
        <?php foreach($files as $file): ?>
            <li><?= $file ?></li>
        <?php endforeach; ?>
    </ul>

它确实正确地遍历数组，因为它为

元素提供了项目符号.但是，在这些项目符号旁边看不到字符串输出.同样，当我打印_r 数组时，值就在那里.

It does iterate through the array correctly as it gives bullets for <li> elements. However no string output is seen next to those bullets. Also when I print_r the array the values are there.

输出看起来像这样，项目符号数量正确，但旁边没有文字:

The output looks like this with the correct number of bullets but no text next to them:

.
.
.

.
.
.

我在这里做错了什么?提前致谢.

What am I doing wrong here? Thanks in advance.

推荐答案

我不确定这个，但这可能有用:

I'm not sure about this, but this might work:

<?php
  $files = scandir($dir);
  //remove "." and ".."
  print_r($files);
?>

<ul>
  <?php foreach($files as $file) { ?>
  <li><?php echo $file; ?></li>
  <?php } ?>
</ul>

这就是我要使用的，如果这不起作用，那可能是因为您的 $dir 变量不包含任何内容(有错误).您的原始代码可能不起作用的原因之一，因为我不认为 <??> 标签在每台服务器上都是兼容的.另外，据我所知，php 中没有 <?=$var ?> 的东西.我以为它只存在于ASP之类的.

That's what I would use, and if this doesn't work, it might be because your $dir variable contains nothing (has an error). One reason why your original code might not have worked, because I don't think the <? ?> tags are compatible on every server. Also, from what I know, there is no <?=$var ?> thing in php. I thought it only exists in ASP and the like.

在回答您关于大括号的劣势的问题时，它们是 PHP 中普遍接受的标准.这在 C/C++/C# 家族中可能有所不同，我不知道.

In answer to your question about the inferiority of curly braces, they are the commonly accepted standard in PHP. This might be different in the C/C++/C# Family, I don't know.

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