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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 |
|---|---|
| 239 | <?php require ABSPATH . 'wp-admin/menu-header.php'; ?> |
| 240 | <div id="wpcontent"> |
| 241 | |
| 242 | <?php |
| 243 | /** |
| 244 | * Fires at the beginning of the content section in an admin page. |
| 245 | * |
| 246 | * @since 3.0.0 |
| 247 | */ |
| 248 | do_action( 'in_admin_header' ); |
| 249 | ?> |
| 250 | |
| 251 | <div id="wpbody" role="main"> |
| 252 | <?php |
| 253 | unset( $blog_name, $total_update_count, $update_title ); |
| 254 | |
| 255 | $current_screen->set_parentage( $parent_file ); |
| 256 | |
| 257 | ?> |