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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 |
|---|---|
| 557 | /** |
| 558 | * Filter the install response after the installation has finished. |
| 559 | * |
| 560 | * @since 2.8.0 |
| 561 | * |
| 562 | * @param bool $response Install response. |
| 563 | * @param array $hook_extra Extra arguments passed to hooked filters. |
| 564 | * @param array $result Installation result data. |
| 565 | */ |
| 566 | $res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result ); |
| 567 | |
| 568 | if ( is_wp_error($res) ) { |
| 569 | $this->result = $res; |
| 570 | return $res; |
| 571 | } |
| 572 | |
| 573 | //Bombard the calling function will all the info which we've just used. |
| 574 | return $this->result; |
| 575 | } |