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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 |
|---|---|
| 255 | include(TEMPLATEPATH . '/functions.php'); |
| 256 | |
| 257 | function shutdown_action_hook() { |
| 258 | do_action('shutdown'); |
| 259 | wp_cache_close(); |
| 260 | } |
| 261 | register_shutdown_function('shutdown_action_hook'); |
| 262 | |
| 263 | // Everything is loaded and initialized. |
| 264 | do_action('init'); |
| 265 | |
| 266 | ?> |