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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 |
|---|---|
| 307 | $posts_columns = array(); |
| 308 | $posts_columns['cb'] = '<input type="checkbox" onclick="checkAll(document.getElementById(\'posts-filter\'));" />'; |
| 309 | $posts_columns['icon'] = ''; |
| 310 | $posts_columns['media'] = _c('Media|media column header'); |
| 311 | $posts_columns['desc'] = _c('Description|media column header'); |
| 312 | $posts_columns['date'] = _c('Date Added|media column header'); |
| 313 | $posts_columns['parent'] = _c('Appears with|media column header'); |
| 314 | $posts_columns['comments'] = '<div class="vers"><img alt="Comments" src="images/comment-grey-bubble.png" /></div>'; |
| 315 | $posts_columns['location'] = _c('Location|media column header'); |
| 316 | $posts_columns = apply_filters('manage_media_columns', $posts_columns); |
| 317 | |
| 318 | return $posts_columns; |
| 319 | } |
| 320 | |
| 321 | function wp_manage_pages_columns() { |
| 322 | $posts_columns = array(); |
| 323 | $posts_columns['cb'] = '<input type="checkbox" onclick="checkAll(document.getElementById(\'posts-filter\'));" />'; |
| 324 | if ( 'draft' === $_GET['post_status'] ) |
| 325 | $posts_columns['modified'] = __('Modified'); |