Do you understand PHP constants and variables? How to use it? ? ?

The previous article introduced you to "How do you understand the constants between PHP constants and variables to restrict users from skipping certain files? 》, this article continues to introduce PHP constants and variables to you, let’s get ready and explore together! ! !

About variable variables: Before the declared variable, add the variable symbol;

Use the code as an example, as follows:

<?php
$china =&#39;我爱你中国&#39;;
echo $china;
?>

The running results are as follows:

Example 2:

<?php
$china =&#39;我爱你中国&#39;;
$zhongguo = &#39;china&#39;;
echo $zhongguo;
?>

The running results are as follows:

Recommended: "PHP Video Tutorial"

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