<meta property="og:image"content="http://example.com/images/loginPageCarausel/unnamed.png" />
        <meta property="og:title" content="Some Title" />
        <meta property="og:url" content="http://example.com" />
        <meta property="og:description" content="No Description" />
        <meta property="og:image:type" content="image/jpeg" />
        <meta property="og:image:width" content="400" />
        <meta property="og:image:height" content="300" />

<?php
        include_once 'includes/functions.php';
        $pg = getPageName('pages.php');
        if($pg) {
            if(isset($_GET['poll'])) {
                $i = $_GET['poll'];
                if(class_exists('Polls') && class_exists('FilesUpload')) {
                    $vip_poll = Polls::getPollDataById(POST_TBL, $i);
                    $title = $vip_poll->question;
                    $gen = $vip_poll->poll_genre;
                    $vip_pollOwnersId = $vip_poll->user_id;
                    $media_files = FilesUpload::getMediaFiles(MED_TBL, $i, $vip_pollOwnersId);
                    $f_type = $media_files->file_type;
                    $f = $media_files->file_name;
                    $img_ext_array = array('jpg', 'gif', 'jpeg', 'png');
                    if (in_array($f_type, $img_ext_array)) {
                        $analysis = Polls::select_all_from_graph_page_data(GP_DATA_TBL, $vip_pollOwnersId, $i);
                        if($analysis != false) {
                            if (!empty($analysis)) {
                                $analysis_data = $analysis->data;
                                if (strlen($analysis_data) > 300) {
                                    $analysis_data = substr($analysis_data, 0, 300) . "...";
                                }
                                $analysis = $analysis_data; ?>
<meta property="fb:app_id" content="1775**************">
        <meta property="og:image" content="http://www.example.com/<?=$f?>" />
        <meta property="og:title" content="<?=$title?>" />
        <meta property="og:url" content="http://example.com/pages.php?vip_poll=<?=$i?>&genre=<?=$gen?>" />
        <meta property="og:description" content="<?=$analysis_data?>" />
        <meta property="og:image:type" content="image/jpeg" />
        <meta property="og:image:width" content="400" />
        <meta property="og:image:height" content="300" />

          <?php                  }
                        }
                    }

                }
            }
        }

        ?>

https://developers.facebook.com/docs/sharing/webmasters/crawler

RewriteCond %{HTTP_USER_AGENT} ^facebookexternalhit
RewriteRule ^(.*)$ ogtags.php?$1 [L,QSA]

RewriteCond %{HTTP_USER_AGENT} facebookexternalhit [NC,OR]

<div class="fb-share-button" data-href="http://www.example.com/pages.php?vip_poll='+app_id+'" data-layout="button_count" data-mobile-iframe="true"><a class="fb-xfbml-parse-ignore" target="_blank" href="https://www.facebook.com/sharer/sharer.php?u='+url_enc+'&src=sdkpreparse"><span id="fb_span"><i class="fa fa-facebook-official" aria-hidden="true" style="color: white"></i> Share </span></a></div>