<?php
$myvar = FALSE;
$my_other_var = 4;
$third_var = 10;
$dc_tx = 22;
// Good practice to initialise variables.
$result = FALSE;
// If required, this comment will explain what we're about to do.
if (isset($myvar)) {
// This comment would explain why we are adding 6 to myvar.
$result = $myvar + 6;
}
elseif (!empty($my_other_var)) {
// This comment explains why we got here and why we're about
// to add these two variables together.
$result = $myvar + $third_var;
}
else {
// Explain why we're using this var as the result.
$result = $dc_tx;
}