YamlInline::dump PHP Method

    public static function dump($value)
    {
        switch (true) {
            case is_resource($value):
                throw new InvalidArgumentException('Unable to dump PHP resources in a YAML file.');
            case is_object($value):
                return '!!php/object:' . serialize($value);
            case is_array($value):
                return self::dumpArray($value);
            case is_null($value):
                return 'null';
            case true === $value:
                return 'true';
            case false === $value:
                return 'false';
            case ctype_digit($value):
                return is_string($value) ? "'{$value}'" : (int) $value;
            case is_numeric($value):
                return is_infinite($value) ? str_ireplace('INF', '.Inf', strval($value)) : (is_string($value) ? "'{$value}'" : $value);
            case false !== strpos($value, "\n"):
                return sprintf('"%s"', str_replace(array('"', "\n"), array('\\"', '\\n'), $value));
            case preg_match('/[ \\s \' " \\: \\{ \\} \\[ \\] , & \\*]/x', $value):
                return sprintf("'%s'", str_replace('\'', '\'\'', $value));
            case '' == $value:
                return "''";
            case preg_match(self::getTimestampRegex(), $value):
                return "'{$value}'";
            case in_array(strtolower($value), array('true', 'on', '+', 'yes', 'y')):
                return "'{$value}'";
            case in_array(strtolower($value), array('false', 'off', '-', 'no', 'n')):
                return "'{$value}'";
            default:
                return $value;
        }
    }

 /**
  * Dumps a PHP value to YAML.
  *
  * @param  mixed   The PHP value
  * @param  integer The level where you switch to inline YAML
  * @param  integer The level o indentation indentation (used internally)
  *
  * @return string  The YAML representation of the PHP value
  */
 public function dump($input, $inline = 0, $indent = 0)
 {
     $output = '';
     $prefix = $indent ? str_repeat(' ', $indent) : '';
     if ($inline <= 0 || !is_array($input) || empty($input)) {
         $output .= $prefix . YamlInline::dump($input);
     } else {
         $isAHash = array_keys($input) !== range(0, count($input) - 1);
         foreach ($input as $key => $value) {
             $willBeInlined = $inline - 1 <= 0 || !is_array($value) || empty($value);
             $output .= sprintf('%s%s%s%s', $prefix, $isAHash ? YamlInline::dump($key) . ':' : '-', $willBeInlined ? ' ' : "\n", $this->dump($value, $inline - 1, $willBeInlined ? 0 : $indent + 2)) . ($willBeInlined ? "\n" : '');
         }
     }
     return $output;
 }