PHP: pass a variable to a function, do something to the variable, return it back

Question

Assuming the following code:

Answer 1

You should try this :

$rowCount = 1;
echo $rowCount.' and ';
$rowCount = doStuff($rowCount);
$rowCount = doStuff($rowCount);
$rowCount = doStuff($rowCount);

Your doStuff() method returns an int that is never used when you simply use the statement doStuff($rowCount); without assignation.