在构造函数中设置默认函数参数

Question

Sorry, still new to OO.

I'm working with CodeIgniter but this question is basically just PHP OO.

I have a class file with a bunch of functions that do a similar thing:

function blah_method($the_id=null)
{                   
        // if no the_id set, set it to user's default
        if(!isset($the_id)){
            $the_id = $this->member['the_id'];          
        } 

Now, Instead of doing that on every method in this class, can I set this up in the constructor? so that I can still pass in $the_id explicitly, to overide it but otherwise it always just defaults to $this->member['the_id'];

What's the most elegant way of doing that?

Answer 1

How about passing all your initialising data to the constructor as an array?

public function __construct(array $settings) {

    // if 'the_id' has not been passed default to class property.
    $the_id = isset($settings['the_id']) ? $settings['the_id'] : $this->member['the_id']; 
    // etc
}