vars = array(); } function set($property,$value) { $this->vars[$property] = $value; } function check_required() { if( ($this->vars) && array_key_exists('og:title',$this->vars) && array_key_exists('og:type', $this->vars) && array_key_exists('og:image',$this->vars) && array_key_exists('og:url', $this->vars) ) return true; return false; } function get() { if($this->check_required()) { $o = "\r\n"; foreach($this->vars as $k => $v) { $o .= '' . "\r\n" ; } return $o; } return ''; } }