Problem querying database

Well... I've come across a problem I can't seem to be able to find a fix for. I've been struggling for an hour now.

I've got this database, and a web form. The web form allows me to enter a unique code somebody has been provided with, and, when I submit the form, the user has to be erased from the database. This part works, but because I can't keep track of the codes in the database, I've written a test condition so that,

IF the code is not found in the database

THEN echo an error message​

IF the code is found in the database

THEN go ahead and remove the user​

The problem is that it does not test correctly. Whether I don't enter anything, or the code does not exist, I get the confirmation message instead of the error one. I've tried with if($result), isset and empty, but none of them worked. Here is my code:

Code:

if(!empty($result)) {
        // Do something
}
if(empty($result)) {
	// Do something
}

 

Yeahp, this is the right way to do it. Thanks for the tip!

I'd shorten it a bit and write if(mysqli_num_rows($result)), as 0 is equal to false, so if there are more than 0 rows, the condition is true.