奇怪的PHP语法 [英] Strange PHP syntax

问题描述

我已经在 PHP 上工作了一段时间，但今天我看到它时对我来说很新：

I've been working on PHP for some time but today when I saw this it came as new to me:

if(preg_match('/foo.*bar/','foo is a bar')):
        echo 'success ';
        echo 'foo comes before bar';

endif;

令我惊讶的是它也运行没有错误。任何人都可以开导我吗？

To my surprise it also runs without error. Can anyone enlighten me?

感谢所有：）

推荐答案

嵌入HTML时更常用这种语法，尤其是模板/显示逻辑。以这种方式嵌入时，它比花括号语法更容易阅读。

That style of syntax is more commonly used when embedding in HTML, especially for template/display logic. When embedded this way, it's a little easier to read than the curly braces syntax.

<div>
<? if ($condition): ?>
  <ul>
    <? foreach($foo as $bar): ?>
        <li><?= $bar ?></li>
    <? endforeach ?>
  </ul>
<? endif ?>
</div>

Versus：

<div>
<? if ($condition) { ?>
  <ul>
    <? foreach($foo as $bar) { ?>
      <li><?= $bar ?></li>
    <? } ?>
  </ul>
<? } ?>

详细的结束标记使得跟踪嵌套代码块变得容易一些，尽管它仍然主要是个人偏好。

The verbose end tags make it a little easier to keep track of nested code blocks, although it's still mostly personal preference.

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