prefix.get_the_ID(); $cache_life = '86400'; //caching time, in seconds, 1 day $commentfb="https://graph.facebook.com/comments/?ids=$urlthis"; if (!file_exists($cache_file) or (time() - filemtime($cache_file) >= $cache_life)){ $data = json_decode(file_get_contents($commentfb),true); $cache_comment=''; foreach($data as $obj){ $cmt=$obj['data']; foreach($cmt as $cm){ $cache_comment.="'; } } file_put_contents($cache_file,$cache_comment); echo $cache_comment; }else{ readfile($cache_file); } ?>