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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 |
|---|---|
| 272 | * @since 3.1.0 |
| 273 | */ |
| 274 | do_action( 'network_admin_notices' ); |
| 275 | } elseif ( is_user_admin() ) { |
| 276 | /** |
| 277 | * Prints user admin screen notices. |
| 278 | * |
| 279 | * @since 3.1.0 |
| 280 | */ |
| 281 | do_action( 'user_admin_notices' ); |
| 282 | } else { |
| 283 | /** |
| 284 | * Prints admin screen notices. |
| 285 | * |
| 286 | * @since 3.1.0 |
| 287 | */ |
| 288 | do_action( 'admin_notices' ); |
| 289 | } |
| 290 | |