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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 |
|---|---|
| 230 | */ |
| 231 | do_action( 'admin_notices' ); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Print generic admin screen notices. |
| 236 | * |
| 237 | * @since 3.1.0 |
| 238 | */ |
| 239 | do_action( 'all_admin_notices' ); |
| 240 | |
| 241 | if ( $parent_file == 'options-general.php' ) |
| 242 | require(ABSPATH . 'wp-admin/options-head.php'); |
| 243 | |