为什么PHP不替换字符串中的变量?

问题描述

我不明白为什么这行简单的代码行不通:

I dont get why this simple line of code does not work:

<?php
$someVariable = 0;
echo 'SomeVariable is $someVariable';
?>

它正在打印出"SomeVariable is $ someVariable"，而不是数字0.是否缺少某些内容或必须启用某些配置选项?

It is printing out "SomeVariable is $someVariable" as opposed to the number 0. Is there something I am missing or some configuration option I have to enable?

推荐答案

这是因为您需要使用双引号代替.当用单引号引起来时，php不会将变量转换为它们的值

That is because you need to use double quote instead.php will not convert variables to their values when surrounded by single quotes

<?php
$someVariable = 0;
echo "SomeVariable is $someVariable";
?>

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