this variable

[mrgrammar]

I see code using the variable $this quite often. For example, it might refer to something as:

$this->$source = preg_replace($pattern, $replacement, $string);

I understand preg_replace. I'm just not sure about $this->$source.

[NogDog]

$this refers to the current instance (object) of the class in which that code exists (in one of that class's methods).

[dalecosp]

NogDog;11047581 wrote:

$this refers to the current instance (object) of the class in which that code exists (in one of that class's methods).

$this 😃

http://php.net/manual/en/language.oop5.basic.php