输出 html 与使用 echo 有什么害处吗?

2022-01-18 00:00:00 tags php html echo

我真的不知道该怎么说，但我可以演示一下:

I have no idea really how to say this, but I can demonstrate it:

<?php
if (true) {
echo "<h1>Content Title</h1>";
}
?>

对

<?php  if (true) {  ?>
<h1>Content Title</h1>
<?php  }  ?>

两者之间有什么区别?不使用echo会不会出现问题?编写 echo "html 代码" 似乎超级乏味；一直以来，特别是对于较大的 html 片段.

What differences are there between the two? Will there be problems caused by not using echo? It just seems super tedious to write echo "html code"; all the time, specially for larger segments of html.

另外，对能够更好地改写我的问题的人表示感谢.:)

Also, bonus kudos to someone who can rephrase my question better. :)

推荐答案

这两种情况有一点区别:

There's a small difference between the two cases:

<?php
if (true) {
    echo "<h1>Content Title</h1>";
}
?>

在这里，因为您使用的是 双引号 在您的字符串中，您可以插入变量并呈现它们的值.例如:

Here, because you're using double quotes in your string, you can insert variables and have their values rendered. For example:

<?php
$mytitle = 'foo';
if (true) {
    echo "<h1>$mytitle</h1>";
}
?>

而在您的第二个示例中，您必须将 echo 包含在 php 块中:

Whereas in your second example, you'd have to have an echo enclosed in a php block:

<?php  if (true) {  ?>
    <h1><?php echo 'My Title'; ?></h1>
<?php  }  ?>

就个人而言，我使用与第二个示例相同的格式，有点扭曲:

Personally, I use the same format as your second example, with a bit of a twist:

<?php if (true): ?>
    <h1><?php echo $mytitle; ?></h1>
<?php endif; ?>

我发现它增加了可读性，尤其是当您有嵌套的控制语句时.

I find that it increases readability, especially when you have nested control statements.

相关文章