Zend_Config_Yaml::_decodeYaml PHP Method

    protected static function _decodeYaml($currentIndent, &$lines)
    {
        $config = array();
        $inIndent = false;
        while (list($n, $line) = each($lines)) {
            $lineno = $n + 1;
            if (strlen($line) == 0) {
                continue;
            }
            if ($line[0] == '#') {
                // comment
                continue;
            }
            $indent = strspn($line, " ");
            // line without the spaces
            $line = trim($line);
            if (strlen($line) == 0) {
                continue;
            }
            if ($indent < $currentIndent) {
                // this level is done
                prev($lines);
                return $config;
            }
            if (!$inIndent) {
                $currentIndent = $indent;
                $inIndent = true;
            }
            if (preg_match("/(\\w+):\\s*(.*)/", $line, $m)) {
                // key: value
                if (strlen($m[2])) {
                    // simple key: value
                    $value = rtrim(preg_replace("/#.*\$/", "", $m[2]));
                    // Check for booleans and constants
                    if (preg_match('/^(t(rue)?|on|y(es)?)$/i', $value)) {
                        $value = true;
                    } elseif (preg_match('/^(f(alse)?|off|n(o)?)$/i', $value)) {
                        $value = false;
                    } elseif (!self::$_ignoreConstants) {
                        // test for constants
                        $value = self::_replaceConstants($value);
                    }
                } else {
                    // key: and then values on new lines
                    $value = self::_decodeYaml($currentIndent + 1, $lines);
                    if (is_array($value) && !count($value)) {
                        $value = "";
                    }
                }
                $config[$m[1]] = $value;
            } elseif ($line[0] == "-") {
                // item in the list:
                // - FOO
                if (strlen($line) > 2) {
                    $config[] = substr($line, 2);
                } else {
                    $config[] = self::_decodeYaml($currentIndent + 1, $lines);
                }
            } else {
                require_once 'Zend/Config/Exception.php';
                throw new Zend_Config_Exception(sprintf('Error parsing YAML at line %d - unsupported syntax: "%s"', $lineno, $line));
            }
        }
        return $config;
    }