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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 |
|---|---|
| 287 | * @since 3.1.0 |
| 288 | */ |
| 289 | do_action( 'network_admin_notices' ); |
| 290 | } elseif ( is_user_admin() ) { |
| 291 | /** |
| 292 | * Prints user admin screen notices. |
| 293 | * |
| 294 | * @since 3.1.0 |
| 295 | */ |
| 296 | do_action( 'user_admin_notices' ); |
| 297 | } else { |
| 298 | /** |
| 299 | * Prints admin screen notices. |
| 300 | * |
| 301 | * @since 3.1.0 |
| 302 | */ |
| 303 | do_action( 'admin_notices' ); |
| 304 | } |
| 305 | |