PHP -- add comments

PHP supports 3 styles of comments

1. C++ style (//) comments

This kind of comment cannot appear in the ?> tag. If the short_open and asp_tag settings are turned on, > and %> cannot appear in the comments either. Medium

<?<span>php
    </span><span>echo</span> 'Hello,PHP!';     <span>//</span><span>我是注释，不被执行    </span>?>

2.C language style, nested comments are not allowed

<?<span>php
    </span><span>/*</span><span>    *我是注释，不被执行
    </span><span>*/</span><span>echo</span> &lsquo;Hello，PHP!<span>&rsquo;;
</span>?>

3.Shell style, the same ban as C++

<?<span>php
    </span><span>echo</span> 'Hello,PHP!';   <span>#</span><span>我是注释，不被执行</span>?>

The above introduces PHP - adding comments, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.