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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 |
|---|---|
| 584 | function shutdown_action_hook() { |
| 585 | do_action('shutdown'); |
| 586 | wp_cache_close(); |
| 587 | } |
| 588 | register_shutdown_function('shutdown_action_hook'); |
| 589 | |
| 590 | $wp->init(); // Sets up current user. |
| 591 | |
| 592 | // Everything is loaded and initialized. |
| 593 | do_action('init'); |
| 594 | |
| 595 | ?> |
| 596 | |