apply_filters( 'img_caption_shortcode', string $output, array $attr, string $content )

2566	 * @see img_caption_shortcode()2567	 *2568	 * @param string $output  The caption output. Default empty.2569	 * @param array  $attr    Attributes of the caption shortcode.2570	 * @param string $content The image element, possibly wrapped in a hyperlink.2571	 */2572	$output = apply_filters( 'img_caption_shortcode', '', $attr, $content );2573 2574	if ( ! empty( $output ) ) {2575		return $output;2576	}2577 2578	$atts = shortcode_atts(