PHP Scope Issues? or is this expected? I don't understand why the `$this` in `Foo::bar()` is being treated as though it is referencing the `$bar` instance. If I declare `Foo::bar()` as static, then I get the expected error of `Using $this when not in object context.` How can you call a method from another object if `$this` in that object refers …

wtf.php

<?php

class Foo
{
	public function bar()
	{
		return $this->baz();
	}
	
	public function baz()
	{
		return 'buz';
	}
}

class Bar
{
	public function test()
	{
		return Foo::bar();
	}
}

$bar = new Bar;

echo $bar->test();
?>

Outputs the following:

PHP Fatal error:  Call to undefined method Bar::baz() in php shell code on line 1

I came across this scenario when debugging some old code, and couldn't figure out why I was getting the "Undefined method" error. No where that I could trace was calling the method in question. I stumbled upon the bug where the code followed this scenario where an instantiated class was calling another class method statically.

I ended up doing something similar to your second suggestion to fix it. I just thought it was very strange that $this within Foo::bar() was referencing the $bar instance.