Were default property values always allowed?

[LLLLLLL]

class foo {
  // was this always allowed?
  public $bar = 'abc default value';

  // or did older versions only allow this?
  public $bar;
}

I couldn't determine the answer to this question looking at documentation. I found some old code where no class had a default value. Maybe it was a developer preference, but I was wondering if older PHP versions didn't even allow default values?

 

Just a question of curiosity. 

[requinix]

Pretty sure they've always allowed it. Literals were fine, but constant expressions

public $bar = 'abc' . ' default value';

(which sure look constant but technically required some evaluation) are relatively new.

[Barand]

Even back in PHP4 days (when they were defined with "var" instead of "public" etc) you could assign default literal values.