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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 |
---|---|
247 | <?php require ABSPATH . 'wp-admin/menu-header.php'; ?> |
248 | <div id="wpcontent"> |
249 |
|
250 | <?php |
251 | /** |
252 | * Fires at the beginning of the content section in an admin page. |
253 | * |
254 | * @since 3.0.0 |
255 | */ |
256 | do_action( 'in_admin_header' ); |
257 | ?> |
258 |
|
259 | <div id="wpbody" role="main"> |
260 | <?php |
261 | unset( $blog_name, $total_update_count, $update_title ); |
262 |
|
263 | $current_screen->set_parentage( $parent_file ); |
264 |
|
265 | ?> |