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

2546	 * @see img_caption_shortcode()2547	 *2548	 * @param string $output  The caption output. Default empty.2549	 * @param array  $attr    Attributes of the caption shortcode.2550	 * @param string $content The image element, possibly wrapped in a hyperlink.2551	 */2552	$output = apply_filters( 'img_caption_shortcode', '', $attr, $content );2553 2554	if ( ! empty( $output ) ) {2555		return $output;2556	}2557 2558	$atts = shortcode_atts(