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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 |
|---|---|
| 384 | * |
| 385 | * Most of WP is loaded at this stage, and the user is authenticated. WP continues |
| 386 | * to load on the init hook that follows (e.g. widgets), and many plugins instantiate |
| 387 | * themselves on it for all sorts of reasons (e.g. they need a user, a taxonomy, etc.). |
| 388 | * |
| 389 | * If you wish to plug an action once WP is loaded, use the wp_loaded hook below. |
| 390 | * |
| 391 | * @since 1.5.0 |
| 392 | */ |
| 393 | do_action( 'init' ); |
| 394 | |
| 395 | // Check site status |
| 396 | if ( is_multisite() ) { |
| 397 | if ( true !== ( $file = ms_site_check() ) ) { |
| 398 | require( $file ); |
| 399 | die(); |
| 400 | } |
| 401 | unset($file); |
| 402 | } |