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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 |
|---|---|
| 353 | add_shortcode('wp_caption', 'img_caption_shortcode'); |
| 354 | add_shortcode('caption', 'img_caption_shortcode'); |
| 355 | |
| 356 | function img_caption_shortcode($attr, $content = null) { |
| 357 | |
| 358 | if ( defined('CAPTIONS_OFF') && true == CAPTIONS_OFF ) |
| 359 | return $content; |
| 360 | |
| 361 | // Allow plugins/themes to override the default caption template. |
| 362 | $output = apply_filters('img_caption_shortcode', '', $attr, $content); |
| 363 | if ( $output != '' ) |
| 364 | return $output; |
| 365 | |
| 366 | extract(shortcode_atts(array( |
| 367 | 'id' => '', |
| 368 | 'align' => 'alignnone', |
| 369 | 'width' => '', |
| 370 | 'caption' => '' |
| 371 | ), $attr)); |