There is no good reason to create a new object to not do anything with it. Most of the time, this is due to a missing piece of code and so could
lead to an unexpected behavior in production.
If it was done on purpose because the constructor has side-effects, then that side-effect code should be moved into a separate method and called
directly.
Noncompliant code example
if ($x < 0) {
new foo; // Noncompliant
}
Compliant solution
$var = NULL;
if ($x < 0) {
$var = new foo;
}
