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

2520	 * @see img_caption_shortcode()2521	 *2522	 * @param string $output  The caption output. Default empty.2523	 * @param array  $attr    Attributes of the caption shortcode.2524	 * @param string $content The image element, possibly wrapped in a hyperlink.2525	 */2526	$output = apply_filters( 'img_caption_shortcode', '', $attr, $content );2527 2528	if ( ! empty( $output ) ) {2529		return $output;2530	}2531 2532	$atts = shortcode_atts(