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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 |
|---|---|
| 537 | /** |
| 538 | * Filter the install response after the installation has finished. |
| 539 | * |
| 540 | * @since 2.8.0 |
| 541 | * |
| 542 | * @param bool $response Install response. |
| 543 | * @param array $hook_extra Extra arguments passed to hooked filters. |
| 544 | * @param array $result Installation result data. |
| 545 | */ |
| 546 | $res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result ); |
| 547 | |
| 548 | if ( is_wp_error($res) ) { |
| 549 | $this->result = $res; |
| 550 | return $res; |
| 551 | } |
| 552 | |
| 553 | //Bombard the calling function will all the info which we've just used. |
| 554 | return $this->result; |
| 555 | } |