PHP: chaining methods with variable methods

Question

Here is my code:

return PDF::loadFile($url)
    ->setPaper('a4')
    ->setOption('margin-top', 10)
    ->stream('somefile.pdf');

As I am calling this method on multiple locations, is there some kind of option to call it in a way like this?

return PDF::loadFile($url)
    ->callSettings()
    ->stream('somefile.pdf');

Where the settings are ->setPaper('a4')->setOption('margin-top', 10).

you have to make a method "callSettings" in the object returned by PDF::loadFile() (I guess it is a PDF...). If so, make a method in the class PDF returning this->setPaper('a4')->setOption('margin-top', 10) (you may have to use self:: instead of $this-> — Random
– Random, Commented Jul 17, 2015 at 9:41

Yang · Accepted Answer · 2015-07-18 03:26:28Z

1

It's easy. Just implement a new callSettings() method in PDF class, that calls those methods and returns $this:

public function callSettings()
{
    $this->setPaper('a4')
         ->setOption('margin-top', 10);

    return $this;
}

answered Jul 18, 2015 at 3:26

Yang

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