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

You can ignore abstract classes like this (note the T_ABSTRACT token):

function get_php_classes($php_code)
{
    $classes = array();
    $tokens = token_get_all($php_code);
    $count = count($tokens);
    for ($i = 2; $i < $count; $i++)
    {
        if ($tokens[$i - 2][0] == T_CLASS && $tokens[$i - 1][0] == T_WHITESPACE && $tokens[$i][0] == T_STRING && !($tokens[$i - 3] && $i - 4 >= 0 && $tokens[$i - 4][0] == T_ABSTRACT))
        {
            $class_name = $tokens[$i][1];
            $classes[] = $class_name;
        }
    }
    return $classes;
}