BlogPosting Schema PHP

blogpost.php

<?php
function is_blog() {
	return (is_archive() || is_author() || is_category() || is_home() || is_single() || is_tag() && 'post' == get_post_type());
}	
?>

<?php if (is_blog()) :

		$tags = get_tags();
		$keywords = '';

		foreach ($tags as $tag) {
			$keywords .= $tag->name . ' ';
		}

	?>
		<script type="application/ld+json">
			{
				"@context": "https://schema.org",
				"@type": "BlogPosting",
				"headline": "<?php echo get_post_field('post_title'); ?>",
				"image": "<?php echo get_the_post_thumbnail_url(); ?>",
				"keywords": "<?php echo trim($keywords); ?>",
				"url": "<?php echo get_permalink(); ?>",
				"dateCreated": "<?php echo substr(get_post_field('post_date'), 0, 10); ?>",
				"datePublished": "<?php echo substr(get_post_field('post_date'), 0, 10); ?>",
				"dateModified": "<?php echo substr(get_post_field('post_modified'), 0, 10); ?>",
				"description": "<?php echo get_post_field('post_excerpt'); ?>",
				"mainEntityOfPage ": {
					"@type": "WebPage",
					"@id": "<?php echo get_permalink(); ?>"
				},
				"publisher": {
					"@type": "Organization",
					"name": "LA Design Concepts",
					"logo": {
						"@type": "ImageObject",
						"url": "https://ladesignconcepts.com/images/ladc_logo0820.png",
						"width": 50,
						"height": 50
					}
				},
				"author": {
					"@type": "Person",
					"name": "Tyler Shepherd"
				}
			}
		</script>
	<?php endif; ?>