Portfolio thumbnail column

portfolio-thumbnail-column.php

/* BEGIN: Add custom columns to admin screen */
add_filter('manage_avada_portfolio_posts_columns', 'avada_portfolio_columns_head', 10);
function avada_portfolio_columns_head($existing_columns) {

	$columns = array(
		'cb'        => $existing_columns['cb'],
		'thumbnail' => '<span class="dashicons dashicons-format-image"></span>'
	);

	return array_merge( $columns, $existing_columns );
}


add_action( 'manage_avada_portfolio_posts_custom_column' , 'avada_portfolio_custom_columns', 10, 2 );
function avada_portfolio_custom_columns( $column, $post_id ) {
	switch ( $column ) {
		case 'thumbnail':
			if( has_post_thumbnail($post_id) ) {
				echo '<a href="' . get_edit_post_link( $post_id ) . '">';
				echo get_the_post_thumbnail( $post_id, 'thumbnail', array('style' => 'max-width:100%;height:auto;'));
				echo '</a>';
			}

			break;
	}
}

/**
 * Should actually be put into admin CSS file
 */
add_action( 'admin_head', 'avada_portfolio_columns_css' );
function avada_portfolio_columns_css() {
	echo '<style>.manage-column.column-thumbnail{ width: 40px; text-align: center; }</style>';
}

/* END: Add custom columns to admin screen */