Admin Functions for posts.

// Add an Edit Post Link to Archives

edit_post_link( __( '{Edit}' ) );

// Add page slug to body class for better styling.

function wpcode_snippet_add_slug_body_class( $classes ) {

	global $post;

	if ( isset( $post ) ) {

		$classes[] = $post->post_type . '-' . $post->post_name;

	}

	return $classes;

}

add_filter( 'body_class', 'wpcode_snippet_add_slug_body_class' );

// Automatically Link Featured Images to Posts

/**

 * Wrap the thumbnail in a link to the post.

 * Only use this if your theme doesn't already wrap thumbnails in a link.

 *

 * @param string $html The thumbnail HTML to wrap in an anchor.

 * @param int    $post_id The post ID.

 * @param int    $post_image_id The image id.

 *

 * @return string

 */

function wpcode_snippet_autolink_featured_images( $html, $post_id, $post_image_id ) {

	$html = '<a href="' . get_permalink( $post_id ) . '" title="' . esc_attr( get_the_title( $post_id ) ) . '">' . $html . '</a>';

	return $html;

}

add_filter( 'post_thumbnail_html', 'wpcode_snippet_autolink_featured_images', 20, 3 );

// Add new badge to new posts.

add_filter( 'the_title', function ( $title, $id ) {

	if ( ! is_admin() && is_single( $id ) ) {

		$number_of_days = 7;

		$post_date      = get_the_date( 'U', $id );

		$current_date   = current_time( 'timestamp' );

		$date_diff      = $current_date - $post_date;

		if ( $date_diff < $number_of_days * DAY_IN_SECONDS ) {

			$title .= ' <span class="new-badge">New</span>';

		}

	}

	return $title;

}, 10, 2 );

add_action( 'wp_head', function () {

	echo '

        <style>

            .new-badge {

                background-color: #ff0000; 

                color: #ffffff; 

                padding: 2px 5px; 

                font-size: 12px; 

                border-radius: 3px;

                margin-left: 5px;

            }

        </style>

    ';

} );