A question about thinkphp template constants.

The manual says: By default, template replacement will only replace the special strings in the template file and will not replace the output content in the dynamic data.

But I can print the template constant __SELF__ in the php file. Why is this? Don't quite understand this principle. .

<code><?php 
public function add(){
        var_dump(__SELF__); //输出string '/Home/Order/add.html' (length=20)
}
?></code>

Reply content:

The manual says: By default, template replacement will only replace the special strings in the template file and will not replace the output content in the dynamic data.

But I can print the template constant __SELF__ in the php file. Why is this? Don't quite understand this principle. .

<code><?php 
public function add(){
        var_dump(__SELF__); //输出string '/Home/Order/add.html' (length=20)
}
?></code>

Of course it can be printed. Is there anything you don’t understand

The __self__ here is used as a magic constant. Try printing __public__ and see if you can print something

It seems that TP has not blocked the __self__ magic constant, so it can be printed

There seem to be two types of PHP variables, one with $ and one without $. The assignment is declared through defined('_PHP_FILE_', 'aaa'). The two variables are similar.