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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 |
|---|---|
| 811 | * |
| 812 | * @since 2.6.0 |
| 813 | * |
| 814 | * @see img_caption_shortcode() |
| 815 | * |
| 816 | * @param string $output The caption output. Default empty. |
| 817 | * @param array $attr Attributes of the caption shortcode. |
| 818 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 819 | */ |
| 820 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 821 | if ( $output != '' ) |
| 822 | return $output; |
| 823 | |
| 824 | $atts = shortcode_atts( array( |
| 825 | 'id' => '', |
| 826 | 'align' => 'alignnone', |
| 827 | 'width' => '', |
| 828 | 'caption' => '', |
| 829 | 'class' => '', |