PHP и YAML: вывод в формате YAML - не выходит пропарсить текст

$text = <<<EOD
text
EOD;
$pars = yaml_parse($text); 
echo var_dump($pars);

<?php
$addr = array(
    "given" => "Chris",
    "family"=> "Dumars",
    "address"=> array(
        "lines"=> "458 Walkman Dr.
        Suite #292",
        "city"=> "Royal Oak",
        "state"=> "MI",
        "postal"=> 48046,
      ),
  );
$invoice = array (
    "invoice"=> 34843,
    "date"=> 980208000,
    "bill-to"=> $addr,
    "ship-to"=> $addr,
    "product"=> array(
        array(
            "sku"=> "BL394D",
            "quantity"=> 4,
            "description"=> "Basketball",
            "price"=> 450,
          ),
        array(
            "sku"=> "BL4438H",
            "quantity"=> 1,
            "description"=> "Super Hoop",
            "price"=> 2392,
          ),
      ),
    "tax"=> 251.42,
    "total"=> 4443.52,
    "comments"=> "Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.",
  );
var_dump(yaml_emit($invoice));
?>

$yaml = Spyc::YAMLDump($result,4,60);
echo"<h5><pre>$yaml</pre></h5>";

<?php
 
class Spyc {
 
  // SETTINGS
 
  const REMPTY = "\0\0\0\0\0";
 
  public static function YAMLDump($array,$indent = false,$wordwrap = false) {
    $spyc = new Spyc;
    return $spyc->dump($array,$indent,$wordwrap);
  }
 
  public function dump($array,$indent = false,$wordwrap = false) {
    // Dumps to some very clean YAML.  We'll have to add some more features
    // and options soon.  And better support for folding.
 
    // New features and options.
    if ($indent === false or !is_numeric($indent)) {
      $this->_dumpIndent = 2;
    } else {
      $this->_dumpIndent = $indent;
    }
 
    if ($wordwrap === false or !is_numeric($wordwrap)) {
      $this->_dumpWordWrap = 40;
    } else {
      $this->_dumpWordWrap = $wordwrap;
    }
 
    // New YAML document
    $string = "---\n";
 
    // Start at the base of the array and move through it.
    if ($array) {
      $array = (array)$array; 
      $previous_key = -1;
      foreach ($array as $key => $value) {
        if (!isset($first_key)) $first_key = $key;
        $string .= $this->_yamlize($key,$value,0,$previous_key, $first_key, $array);
        $previous_key = $key;
      }
    }
    return $string;
  }
 
  /**
     * Attempts to convert a key / value array item to YAML
     * @access private
     * @return string
     * @param $key The name of the key
     * @param $value The value of the item
     * @param $indent The indent of the current node
     */
  private function _yamlize($key,$value,$indent, $previous_key = -1, $first_key = 0, $source_array = null) {
    if (is_array($value)) {
      if (empty ($value))
        return $this->_dumpNode($key, array(), $indent, $previous_key, $first_key, $source_array);
      // It has children.  What to do?
      // Make it the right kind of item
      $string = $this->_dumpNode($key, self::REMPTY, $indent, $previous_key, $first_key, $source_array);
      // Add the indent
      $indent += $this->_dumpIndent;
      // Yamlize the array
      $string .= $this->_yamlizeArray($value,$indent);
    } elseif (!is_array($value)) {
      // It doesn't have children.  Yip.
      $string = $this->_dumpNode($key, $value, $indent, $previous_key, $first_key, $source_array);
    }
    return $string;
  }
 
  /**
     * Attempts to convert an array to YAML
     * @access private
     * @return string
     * @param $array The array you want to convert
     * @param $indent The indent of the current level
     */
  private function _yamlizeArray($array,$indent) {
    if (is_array($array)) {
      $string = '';
      $previous_key = -1;
      foreach ($array as $key => $value) {
        if (!isset($first_key)) $first_key = $key;
        $string .= $this->_yamlize($key, $value, $indent, $previous_key, $first_key, $array);
        $previous_key = $key;
      }
      return $string;
    }
  }
 
  /**
     * Returns YAML from a key and a value
     * @access private
     * @return string
     * @param $key The name of the key
     * @param $value The value of the item
     * @param $indent The indent of the current node
     */
  private function _dumpNode($key, $value, $indent, $previous_key = -1, $first_key = 0, $source_array = null) {
 
    $spaces = str_repeat(' ',$indent);
 
    if (is_array ($source_array) && array_keys($source_array) === range(0, count($source_array) - 1)) {
      // It's a sequence
      $string = $spaces.'- '.$value."\n";
    } else {
      // It's mapped
      if (strpos($key, ":") !== false || strpos($key, "#") !== false) { $key = '"' . $key . '"'; }
      $string = rtrim ($spaces.$key.': '.$value)."\n";
    }
    return $string;
  }
 
  /**
     * Creates a literal block for dumping
     * @access private
     * @return string
     * @param $value
     * @param $indent int The value of the indent
     */
  private function _doLiteralBlock($value,$indent) {
    if ($value === "\n") return '\n';
    if (strpos($value, "\n") === false && strpos($value, "'") === false) {
      return sprintf ("'%s'", $value);
    }
    $exploded = explode("\n",$value);
    $newValue = '|';
    $indent  += $this->_dumpIndent;
    $spaces   = str_repeat(' ',$indent);
    foreach ($exploded as $line) {
      $newValue .= "\n" . $spaces . ($line);
    }
    return $newValue;
  }
 
  /**
     * Folds a string of text, if necessary
     */
  private function _doFolding($value,$indent) {
    return $value;
  }
}
?>