$args = array(
		'post_type' => 'attachment',
		'numberposts' => null,
		'post_status' => null,
		'post_parent' => $post->ID
	);
	
	$attachments = get_posts( $args );
	if ( $attachments ) {
		foreach ( $attachments as $attachment ) {

		$attachment_id = $post->ID ; // attachment ID
		$image_attributes = wp_get_attachment_image_src( $attachment_id ); 
		echo $image_attributes[0];
		echo $image_attributes[1];
		echo $image_attributes[2];
		
			echo '<li>';
				echo wp_get_attachment_image( $attachment->ID, 'full' );
				
				//echo filesize( get_attached_file( $attachment->ID ) );
				echo get_post_meta($post->ID, 'wp_attachment_image_alt', true);
				
				//echo wp_get_attachment_metadata( $attachment->ID, $unfiltered );
				
    //echo wp_get_attachment_link('width');
    //echo wp_get_attachment_link('height');
				
				//echo '<p>';
				//echo apply_filters( 'the_title', $attachment->post_title );
				//echo '</p>';
			echo '</li>';
		}
	}

Wordpress get attachments (not working, but more adaptive than previous)

PHP