how to obtain all subclasses of a class in php
function getSubclassesOf($parent) { $result = array(); foreach (get_declared_classes() as $class) { if (is_subclass_of($class, $parent)) $result[] = $class; } return $result;}Coincidentally, this implementation is exactly the one given in the question linked to by Vadim.
Using PHP 7.4:
$children = array_filter(get_declared_classes(), fn($class) => is_subclass_of($class, MyClass::class));
function getClassNames(string $className): array{ $ref = new ReflectionClass($className); $parentRef = $ref->getParentClass(); return array_unique(array_merge( [$className], $ref->getInterfaceNames(), $ref->getTraitNames(), $parentRef ?getClassNames($parentRef->getName()) : [] ));}