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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 |
|---|---|
| 348 | else |
| 349 | $posts_columns['date'] = __('Date'); |
| 350 | $posts_columns['title'] = __('Title'); |
| 351 | $posts_columns['author'] = __('Author'); |
| 352 | $posts_columns['categories'] = __('Categories'); |
| 353 | $posts_columns['tags'] = __('Tags'); |
| 354 | if ( !in_array($_GET['post_status'], array('pending', 'draft', 'future')) ) |
| 355 | $posts_columns['comments'] = '<div class="vers"><img alt="Comments" src="images/comment-grey-bubble.png" /></div>'; |
| 356 | $posts_columns['status'] = __('Status'); |
| 357 | $posts_columns = apply_filters('manage_posts_columns', $posts_columns); |
| 358 | |
| 359 | return $posts_columns; |
| 360 | } |
| 361 | |
| 362 | // define the columns to display, the syntax is 'internal name' => 'display name' |
| 363 | function wp_manage_media_columns() { |
| 364 | $posts_columns = array(); |
| 365 | $posts_columns['cb'] = '<input type="checkbox" />'; |
| 366 | $posts_columns['icon'] = ''; |