'', 'description' => '', 'keywords' => '', 'og:locale' => 'en_US', 'og:title' => '', 'og:type' => 'website', 'og:image' => '', 'og:image:width' => 1200, 'og:image:height' => 630, '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,$path=NULL) { $this->ua = strtolower($_SERVER['HTTP_USER_AGENT']); if (array_key_exists('HTTP_X_FORWARDED_PROTO',$_SERVER)) { $protocol = htmlspecialchars($_SERVER['HTTP_X_FORWARDED_PROTO'], ENT_QUOTES); } else { $protocol = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https' : 'http' ); } $this->host = $protocol.'://'.htmlspecialchars($_SERVER['HTTP_HOST'], ENT_QUOTES); $this->path = htmlspecialchars(is_string($path) ? $path : $_SERVER['REQUEST_URI'], ENT_QUOTES); $this->url = $this->host."/".$this->path; $this->addTag('og:url',$this->url); if (!empty($json)) { $this->share = json_decode(file_get_contents($json),true); $this->setPath($this->path); } } function isBot() { $isBot = false; for ($i=0; $iuaList); $i++) { if (strpos($this->ua,$this->uaList[$i])!==false) $isBot = true; } return $isBot; } function setPath($path) { $this->path = $path; $data = $this->share["default"]; if (@$this->share[$path]) $data = array_merge($data, $this->share[$path]); $this->addTags($data); } function addTag($tag, $content) { if ($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 ''; } } } } ?>