rspec/rules/S1821/php/rule.adoc

Nested ``switch`` structures are difficult to understand because you can easily confuse the cases of an inner ``switch`` as belonging to an outer statement. Therefore nested ``switch`` statements should be avoided.

Specifically, you should structure your code to avoid the need for nested ``switch`` statements, but if you cannot, then consider moving the inner ``switch`` to another function.

== Noncompliant Code Example

----
switch($a) {
  case "foo":
    switch($b) { // Noncompliant
      case "bar":
        doSomething();
      break;
    }
  break;
}
----

== Compliant Solution

----
function handleFoo($foo) {
  switch($foo) {
    case "bar":
      doSomething();
    break;
  }
}

switch($a) {
  case "foo":
    handleFoo($b);
  break;
}
----