这是什么PHP语法? [英] What is this PHP syntax?

问题描述

我最近看到了一些示例PHP代码，如下所示:

I recently saw some sample PHP code that looked like this:

$myObj->propertyOne = 'Foo'
      ->propertyTwo = 'Bar'
      ->MethodA('blah');

相对于:

$myObj->propertyOne = 'Foo';
$myObj->propertyTwo = 'Bar';
$myObj->MethodA('blah');

这是来自特定框架还是特定版本的PHP，因为我从未见过它起作用?

Is this from a particular framework or a particular version of PHP because I have never seen it work?

推荐答案

您看到的是fluent interface，但是您的代码示例错误.长话短说，fluent setter应该返回$this:

What you saw was fluent interface, however your code sample is wrong. To make long story short, fluent setter should return $this:

class TestClass {
    private $something;
    private $somethingElse;

    public function setSomething($sth) {
        $this->something = $sth;

        return $this;
    }

    public function setSomethingElse($sth) {
        $this->somethingElse = $sth;

        return $this;
    }
}

用法:

$sth = new TestClass();
$sth->setSomething(1)
    ->setSomethingElse(2);

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