thinkphp method within the same template calls another method

//Method call in the same template in thinkphp

public function a(&$txt){

$txt.='hh';

}

public function b(){

$b='bbb';

$this->a($b);

echo $b;//'bbbhh'

}

&$: Address call

public function c(){

$a='hh';

return $a;

}

public function d(){

$d = $this->c();//Call with return value

echo $ d;//'hh'

}

The above introduces how a method in the same template of thinkphp calls another method, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.