Phan\Analysis\ParentClassExistsAnalyzer::analyzeParentClassExists PHP Method

    public static function analyzeParentClassExists(CodeBase $code_base, Clazz $clazz)
    {
        // Don't worry about internal classes
        if ($clazz->isInternal()) {
            return;
        }
        if ($clazz->hasParentType()) {
            self::fqsenExistsForClass($clazz->getParentClassFQSEN(), $code_base, $clazz, Issue::UndeclaredExtendedClass);
        }
        foreach ($clazz->getInterfaceFQSENList() as $fqsen) {
            self::fqsenExistsForClass($fqsen, $code_base, $clazz, Issue::UndeclaredInterface);
        }
        foreach ($clazz->getTraitFQSENList() as $fqsen) {
            self::fqsenExistsForClass($fqsen, $code_base, $clazz, Issue::UndeclaredTrait);
        }
    }

 /**
  * Take a pass over all classes verifying various
  * states.
  *
  * @return null
  */
 public static function analyzeClasses(CodeBase $code_base)
 {
     $class_count = count($code_base->getClassMap());
     // Take a pass to import all details from ancestors
     $i = 0;
     foreach ($code_base->getClassMap() as $fqsen => $class) {
         CLI::progress('classes', ++$i / $class_count);
         if ($class->isInternal()) {
             continue;
         }
         // Make sure the parent classes exist
         ParentClassExistsAnalyzer::analyzeParentClassExists($code_base, $class);
         DuplicateClassAnalyzer::analyzeDuplicateClass($code_base, $class);
         ParentConstructorCalledAnalyzer::analyzeParentConstructorCalled($code_base, $class);
         PropertyTypesAnalyzer::analyzePropertyTypes($code_base, $class);
     }
 }