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add_filter( 'amp_post_template_analytics', 'xyz_amp_add_custom_analytics' );
function xyz_amp_add_custom_analytics( $analytics ) {
    if ( ! is_array( $analytics ) ) {
        $analytics = array();
    }

    // https://developers.google.com/analytics/devguides/collection/amp-analytics/
    $analytics['xyz-googleanalytics'] = array(
        'type' => 'googleanalytics',
        'attributes' => array(

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<div class="fb-quote"></div>

Pseric

<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/zh_TW/sdk.js#xfbml=1&version=v2.6";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

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if ( current_user_can('contributor') && !current_user_can('upload_files') )
	add_action('admin_init', 'allow_contributor_uploads');

function allow_contributor_uploads() {
	$contributor = get_role('contributor');
	$contributor->add_cap('upload_files');
}

Pseric

add_filter('mce_buttons','wysiwyg_editor');
function wysiwyg_editor($mce_buttons) {
    $pos = array_search('wp_more',$mce_buttons,true);
    if ($pos !== false) {
        $tmp_buttons = array_slice($mce_buttons, 0, $pos+1);
        $tmp_buttons[] = 'wp_page';
        $mce_buttons = array_merge($tmp_buttons, array_slice($mce_buttons, $pos+1));
    }
    return $mce_buttons;
}