'', 'description' => '', 'keywords' => '', 'og:title' => '', 'og:type' => 'website', 'og:image' => '', 'og:url' => '', 'og:description' => '', 'og:site_name' => '', 'twitter:card' => 'summary_large_image', 'twitter:title' => '', 'twitter:image' => '', 'twitter:description' => '', 'twitter:site' => '', 'twitter:creator' => '' ); var $nonMeta = array( 'title' ); function Meta($json=NULL) { $this->ua = strtolower($_SERVER['HTTP_USER_AGENT']); if (array_key_exists('HTTP_X_FORWARDED_PROTO',$_SERVER)) { $protocol = $_SERVER['HTTP_X_FORWARDED_PROTO']; } else { $protocol = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https' : 'http' ); } $this->host = $protocol.'://'.$_SERVER['HTTP_HOST']; $this->path = $_SERVER['REQUEST_URI']; $this->url = $this->host.$this->path; $this->addTag('og:url',$this->url); if (!empty($json)) { $share = json_decode(file_get_contents($json),true); $data = $share["default"]; if (@$share[$this->path]) $data = array_merge($data, $share[$this->path]); $this->addTags($data); } } function addTag($tag, $content) { $this->tags[$tag] = $content; if ($tag==='title' || $tag==='description' || $tag==='image') { $this->tags['twitter:'.$tag] = $content; $this->tags['og:'.$tag] = $content; } } function addTags($data) { foreach ($data as $key => $value) { $this->addTag($key,$value); } } function write() { foreach ($this->tags as $key => $value) { if (in_array($key,$this->nonMeta)) { echo '<'.$key.'>'.$value.''; } else { $type = (strpos($key,'og:')!==false) ? 'property' : 'name'; echo ''; } } } } ?>