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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 |
|---|---|
| 873 | * |
| 874 | * @since 2.6.0 |
| 875 | * |
| 876 | * @see img_caption_shortcode() |
| 877 | * |
| 878 | * @param string $output The caption output. Default empty. |
| 879 | * @param array $attr Attributes of the caption shortcode. |
| 880 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 881 | */ |
| 882 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 883 | if ( $output != '' ) |
| 884 | return $output; |
| 885 | |
| 886 | $atts = shortcode_atts( array( |
| 887 | 'id' => '', |
| 888 | 'align' => 'alignnone', |
| 889 | 'width' => '', |
| 890 | 'caption' => '', |
| 891 | 'class' => '', |