Someone has answered the function and I will answer how to use it. . . This is so simple. In non-input method mode, add the - sign to the right of the + sign on the main keyboard 0 and to the left? The > sign to the left of the key, this > can only be typed by holding down the shift key. To switch between input method mode and letter input mode, just press shift.

First of all, you need to understand what $this is and what is its role?

$this is a pointer to the current object. To put it bluntly, it means the previous object. This can realize, for example, class attribute method calls, etc.

$this->So-and-so method.

For example

class man{

function test1(){

$this->test2();

}

function test2(){

echo "hello";

}

}

$m = new man();

$m->test1();

//Output: hello;