Curly Braces Notation in PHP

Question

I was reading source of OpenCart and I ran into such expression below. Could someone explain it to me:

$quote = $this->{\'model_shipping_\' . $result[\'co         


        

Answer 1

The name of the property is computed during runtime from two strings

Say, $result['code'] is 'abc', the accessed property will be

$this->model_shipping_abc

This is also helpful, if you have weird characters in your property or method names.

Otherwise there would be no way to distinguish between the following:

class A {
  public $f = 'f';
  public $func = 'uiae';
}

$a = new A();
echo $a->f . 'unc'; // "func"
echo $a->{'f' . 'unc'}; // "uiae"