Question

To get the name of a subclass, I use get_called_class().

What should I use to get the file path of a subclass?

Answer 1

Use Reflection, specifically ReflectionClass::getFileName(). How you instantiate your ReflectionClass depends entirely on the current scope, eg

// globally
$reflectionClass = new ReflectionClass('SubClassName');

// within the sub class
$reflectionClass = new ReflectionClass(__CLASS__);

// within either sub or parent class in a static method
$reflectionClass = new ReflectionClass(get_called_class());

// within either sub or parent class, provided the instance is a sub class
$reflectionClass = new RelfectionObject($this);

// filename
$fn = $reflectionClass->getFileName();

// what I assume you mean by "path"
$path = dirname($fn);