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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 |
|---|---|
| 20 | * {@internal Missing Short Description}} |
| 21 | * |
| 22 | * @since unknown |
| 23 | * |
| 24 | * @param unknown_type $author |
| 25 | */ |
| 26 | function export_wp($author='') { |
| 27 | global $wpdb, $post_ids, $post, $wp_taxonomies; |
| 28 | |
| 29 | do_action('export_wp'); |
| 30 | |
| 31 | $filename = 'wordpress.' . date('Y-m-d') . '.xml'; |
| 32 | |
| 33 | header('Content-Description: File Transfer'); |
| 34 | header("Content-Disposition: attachment; filename=$filename"); |
| 35 | header('Content-Type: text/xml; charset=' . get_option('blog_charset'), true); |
| 36 | |
| 37 | $where = ''; |
| 38 | if ( $author and $author != 'all' ) { |