A common code smell that can hinder the clarity of source code is making assignments within sub-expressions. This practice involves assigning a
value to a variable inside a larger expression, such as within a loop or a conditional statement.
This practice essentially gives a side-effect to a larger expression, thus making it less readable. This often leads to confusion and potential
errors.
Exceptions
This rule ignores assignments in conditions of while statements and assignments enclosed in relational expressions.
while (($line = next_line()) != NULL) {...}
while ($line = next_line()) {...}
