Strange Result validating User Supplied Data

[objnoob]

For some reason the line commented // executes unexectedly does exactly that

 

Any ideas why?

if ($_POST['user'] == null){
		$errors[] = 'An Interviewer ID is Required';
	}elseif ($_POST['task'] != 'receipting' || $_POST['task'] != 'dataentry'){
		$errors[] = 'Invalid Task'; // EXECUTES UNEXPECTEDLY
	}
	if (!empty($errors)){
		print_LoginForm($errors);
	}

 

	echo "</b><select name='task'>\n";
echo "<option value='receipting'>Receipting</option>\n";
echo "<option value='dataentry'>Data Entry</option>\n";
echo "</select>\n";

[Pikachu2000]

Assuming that $_POST['task'] must equal either 'receipting' or 'dataentry', change || to &&.

[objnoob]

Heh. My first idea was to check whether it == 'receipting' || == 'dataentry', but then I decided to check whether it

!= and managed to get my operator thought process screwed.

 

Thanks Pika