StuffieStephie/header.php

## header.php
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
<meta charset="<?php bloginfo( 'charset' ); ?>">
<meta name="viewport" content="width=device-width, initial-scale=1">
<?php
  $meta = array(
    "title" => get_bloginfo( 'title' ),
    "desc"  => get_bloginfo( 'description'),
    "url"   => home_url( $_SERVER['REQUEST_URI'] ),
    "keywords" => 'generic tags, for example',
    "image" => get_stylesheet_directory_uri() . "/images/ba_fallback.png",
  );

  if ( is_single() ) {
    $meta["title"] .= ' | '. get_the_title($post);
    if(!empty(get_the_excerpt($post))){
      $meta["desc"]   = get_the_excerpt($post);
    }

    if(has_post_thumbnail($post->ID)){
      $meta["image"] = get_the_post_thumbnail_url($post->ID, 'full');
    }

    $post_tags = get_the_tags($post->ID);
    if ( $post_tags ) {
        foreach( $post_tags as $tag ) {
        $meta["keywords"] .= ', ' . $tag->name;
        }
    }
  }
?>
<meta name="description" content="<?php echo $meta["desc"]; ?>" />
<meta name="keywords"    content="<?php echo $meta["keywords"]; ?>" />

<!-- Open Graph -->
<meta property="og:locale"      content="en_US" />
<meta property="og:title"       content="<?php echo $meta["title"]; ?>" />
<meta property="og:description" content="<?php echo $meta["desc"]; ?>" />
<meta property="og:image"       content="<?php echo $meta["image"]; ?>" />
<meta property="og:url"         content="<?php echo $meta['url']; ?>" />
<meta property="og:site_name"   content="<?php bloginfo('title'); ?>" />
<meta property="og:type"        content="website" />