Determining what classes are defined in a PHP class file

Question

Given that each PHP file in our project contains a single class definition, how can I determine what class or classes are defined within the file?

I know I could jus

Answer 1

My snippet too. Can parse files with multiple classes, interfaces, arrays and namespaces. Returns an array with classes+types (class, interface, abstract) divided by namespaces.

= 0 && $tokens[$i - 2][0] == T_CLASS && $tokens[$i - 1][0] == T_WHITESPACE && $tokens[$i][0] == T_STRING) 
            {
                if($i-4 >=0 && $tokens[$i - 4][0] == T_ABSTRACT)
                {
                    $classes[$ii][] = array('name' => $tokens[$i][1], 'type' => 'ABSTRACT CLASS');
                }
                else
                {
                    $classes[$ii][] = array('name' => $tokens[$i][1], 'type' => 'CLASS');
                }
            }
            elseif ($i-2 >= 0 && $tokens[$i - 2][0] == T_INTERFACE && $tokens[$i - 1][0] == T_WHITESPACE && $tokens[$i][0] == T_STRING)
            {
                $classes[$ii][] = array('name' => $tokens[$i][1], 'type' => 'INTERFACE');
            }
        }
        error_reporting($er);
        if (empty($classes)) return NULL;

        if(!empty($nsPos))
        {
            foreach($nsPos as $k => $p)
            {
                $ns = '';
                for($i = $p['start'] + 1; $i < $p['end']; $i++)
                    $ns .= $tokens[$i][1];

                $ns = trim($ns);
                $final[$k] = array('namespace' => $ns, 'classes' => $classes[$k+1]);
            }
            $classes = $final;
        }
        return $classes;
    }

Outputs something like this...

array
  'namespace' => string 'test\foo' (length=8)
  'classes' => 
    array
      0 => 
        array
          'name' => string 'bar' (length=3)
          'type' => string 'CLASS' (length=5)
      1 => 
        array
          'name' => string 'baz' (length=3)
          'type' => string 'INTERFACE' (length=9)
array
  'namespace' => string 'this\is\a\really\big\namespace\for\testing\dont\you\think' (length=57)
  'classes' => 
    array
      0 => 
        array
          'name' => string 'yes_it_is' (length=9)
          'type' => string 'CLASS' (length=5)
      1 => 
        array
          'name' => string 'damn_too_big' (length=12)
          'type' => string 'ABSTRACT CLASS' (length=14)
      2 => 
        array
          'name' => string 'fogo' (length=6)
          'type' => string 'INTERFACE' (length=9)

Might help someone!