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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 |
|---|---|
| 716 | * @since 2.6.0 |
| 717 | * |
| 718 | * @param array $attr Attributes attributed to the shortcode. |
| 719 | * @param string $content Optional. Shortcode content. |
| 720 | * @return string |
| 721 | */ |
| 722 | function img_caption_shortcode($attr, $content = null) { |
| 723 | |
| 724 | // Allow plugins/themes to override the default caption template. |
| 725 | $output = apply_filters('img_caption_shortcode', '', $attr, $content); |
| 726 | if ( $output != '' ) |
| 727 | return $output; |
| 728 | |
| 729 | extract(shortcode_atts(array( |
| 730 | 'id' => '', |
| 731 | 'align' => 'alignnone', |
| 732 | 'width' => '', |
| 733 | 'caption' => '' |
| 734 | ), $attr)); |