Here is a script:

$n = 3;
while( --$n )
{	echo "Evaluating $n:<br>";
	switch( $n )
	{	case 2:
			continue;
		case 1:
			break;
	}
	echo "fell through<br>";
}

Here is the output:

Evaluating 2:
fell through
Evaluating 1:
fell through

Here is what was expected:

Evaluating 2:
Evaluating 1:
fell through

Changing "continue" to "continue 2" makes it function correctly.  This should not be correct, as a switch is not generally regarded as a looping structure, and PHP does not appear to treat it as one - the continue is simply treated as a break.