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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 |
|---|---|
| 613 | $this->register_globals(); |
| 614 | |
| 615 | /** |
| 616 | * Fires once the WordPress environment has been set up. |
| 617 | * |
| 618 | * @since 2.1.0 |
| 619 | * |
| 620 | * @param WP &$this Current WordPress environment instance (passed by reference). |
| 621 | */ |
| 622 | do_action_ref_array( 'wp', array( &$this ) ); |
| 623 | } |
| 624 | |
| 625 | } |
| 626 | |
| 627 | /** |
| 628 | * Helper class to remove the need to use eval to replace $matches[] in query strings. |
| 629 | * |
| 630 | * @since 2.9.0 |
| 631 | */ |