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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 |
|---|---|
| 555 | * @since 2.6.0 |
| 556 | * |
| 557 | * @param array $attr Attributes attributed to the shortcode. |
| 558 | * @param string $content Optional. Shortcode content. |
| 559 | * @return string |
| 560 | */ |
| 561 | function img_caption_shortcode($attr, $content = null) { |
| 562 | |
| 563 | // Allow plugins/themes to override the default caption template. |
| 564 | $output = apply_filters('img_caption_shortcode', '', $attr, $content); |
| 565 | if ( $output != '' ) |
| 566 | return $output; |
| 567 | |
| 568 | extract(shortcode_atts(array( |
| 569 | 'id' => '', |
| 570 | 'align' => 'alignnone', |
| 571 | 'width' => '', |
| 572 | 'caption' => '' |
| 573 | ), $attr)); |