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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 |
|---|---|
| 17 | if ( ! isset( $_REQUEST['action'] ) ) |
| 18 | die('-1'); |
| 19 | |
| 20 | require_once('../wp-load.php'); |
| 21 | |
| 22 | require_once('./includes/admin.php'); |
| 23 | @header('Content-Type: text/html; charset=' . get_option('blog_charset')); |
| 24 | send_nosniff_header(); |
| 25 | |
| 26 | do_action('admin_init'); |
| 27 | |
| 28 | if ( ! is_user_logged_in() ) { |
| 29 | |
| 30 | if ( isset( $_POST['action'] ) && $_POST['action'] == 'autosave' ) { |
| 31 | $id = isset($_POST['post_ID'])? (int) $_POST['post_ID'] : 0; |
| 32 | |
| 33 | if ( ! $id ) |
| 34 | die('-1'); |
| 35 | |