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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 |
|---|---|
| 399 | |
| 400 | /** |
| 401 | * Fires when an 'action' request variable is sent. |
| 402 | * |
| 403 | * The dynamic portion of the hook name, `$action`, refers to |
| 404 | * the action derived from the `GET` or `POST` request. |
| 405 | * |
| 406 | * @since 2.6.0 |
| 407 | */ |
| 408 | do_action( "admin_action_{$action}" ); |
| 409 | } |
| 410 | |