PHP如何制作这样的函数？第一（） - ＆GT; callSecond（）;?

Question

我尝试在下面创建一个这样的函数，如何做到这一点，任何一个例子？

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Answer 1

  <?php
     class OtherClass{
        public function callSecond(){
            echo 'Second Called';
        }  
     }

    class MyClass{
        public function first(){
            return new OtherClass();
        }
    }

    $myClass = new MyClass();
    $myClass->first()->callSecond();
?>

Answer 2

您只需要一直返回对象。它被称为fluent interface。它可以是自我或其他对象。

<php
class A
{
    public function first()
    {
        // Do something

        return $this;
    }
    public function callSecond()
    {
        // Do somewthing else

        return $this;
    }
}

$a = (new A())->first()->callSecond();