Well-named functions can allow the users of your code to understand at a glance what to expect from the function - even before reading the documentation. Toward that end, methods returning a boolean property should have names that start with "is" or "has" rather than with "get".

Note that this rule will only apply to functions that are documented to return a boolean.

Noncompliant Code Example

/**
 * @return boolean
 */
public function getFoo() // Noncompliant
{
  return foo;
}

Compliant Solution

/**
 * @return boolean
 */
public function isFoo()
{
  return true;
}