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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1709 | * |
| 1710 | * @since 2.6.0 |
| 1711 | * |
| 1712 | * @see img_caption_shortcode() |
| 1713 | * |
| 1714 | * @param string $output The caption output. Default empty. |
| 1715 | * @param array $attr Attributes of the caption shortcode. |
| 1716 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 1717 | */ |
| 1718 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 1719 | |
| 1720 | if ( ! empty( $output ) ) { |
| 1721 | return $output; |
| 1722 | } |
| 1723 | |
| 1724 | $atts = shortcode_atts( |
| 1725 | array( |
| 1726 | 'id' => '', |
| 1727 | 'caption_id' => '', |