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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 |
|---|---|
| 379 | . $content . '<p class="wp-caption-text">' . $caption . '</p></div>'; |
| 380 | } |
| 381 | |
| 382 | add_shortcode('gallery', 'gallery_shortcode'); |
| 383 | |
| 384 | function gallery_shortcode($attr) { |
| 385 | global $post; |
| 386 | |
| 387 | // Allow plugins/themes to override the default gallery template. |
| 388 | $output = apply_filters('post_gallery', '', $attr); |
| 389 | if ( $output != '' ) |
| 390 | return $output; |
| 391 | |
| 392 | // We're trusting author input, so let's at least make sure it looks like a valid orderby statement |
| 393 | if ( isset( $attr['orderby'] ) ) { |
| 394 | $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] ); |
| 395 | if ( !$attr['orderby'] ) |
| 396 | unset( $attr['orderby'] ); |
| 397 | } |