Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
304 views
in Technique[技术] by (71.8m points)

php - What does "return $this" mean?

I'm trying to understand this code, and when I arrived at the final line, I didn't get it. :(

Can I have your help in order to find out, what does return $this mean ?

public function setOptions(array $options) {
    $methods = get_class_methods($this);
    foreach ($options as $key => $value) {
        $method = 'set' . ucfirst($key);
        if (in_array($method, $methods)) {
            $this->$method($value);
        }
    }

    //???? - return what ?
    return $this;
}

Update:
I've removed my comments for better clarification.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

This way of coding is called fluent interface. return $this returns the current object, so you can write code like this:

$object
  ->function1()
  ->function2()
  ->function3()
  ;

instead of:

$object->function1();
$object->function2();
$object->function3();

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...