5 replies to this topic

[gold killer]

Its more of a question really.
Ive recently seen people using functions like so:

public function A()
{
 //function here
}

private function B()
{
 //function here
}

rather than just

function C()
{
 //function here
}

So what does putting private or public infront of function do?

[Demonslay]

PHP 5 Class Visibility

Basically those keywords just simply tell the overall class what can call that function, and what can modify it. For example, public is well, public, as it can be called from anywhere in or outside the class, can be over-ridden by another class that extends the class, and the such, whereas a private class cannot be called from outside the class, and can only be called from inside the class itself.

[gold killer]

ok, thanks for your help

[upstream]

oh..i dunno you can use that kind of function declaration in php...so the default class visibility is private?

[Demonslay]

No, the default is public.

[cheerio]

class myClass
{
  public function A()
  {
	echo "Hello!";
  }
  private function B()
  {
	echo "Hi!";
  }
  public function C()
  {
	$this->B();
  }
}
$class = new myClass;
$class->A(); // Echoes "Hello!"
$class->B(); // Gives an error
$class->C(); // Echoes "Hi!"