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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 |
|---|---|
| 41 | </form> |
| 42 | </div> |
| 43 | </div> |
| 44 | |
| 45 | <?php |
| 46 | |
| 47 | function export_wp() { |
| 48 | global $wpdb, $post_ids, $post; |
| 49 | |
| 50 | do_action('export_wp'); |
| 51 | |
| 52 | $filename = 'wordpress.' . date('Y-m-d') . '.xml'; |
| 53 | |
| 54 | header('Content-Description: File Transfer'); |
| 55 | header("Content-Disposition: attachment; filename=$filename"); |
| 56 | header('Content-Type: text/xml; charset=' . get_option('blog_charset'), true); |
| 57 | |
| 58 | $where = ''; |
| 59 | if ( isset( $_GET['author'] ) && $_GET['author'] != 'all' ) { |