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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 |
|---|---|
| 573 | * |
| 574 | * @param array $update_data { |
| 575 | * Fetched update data. |
| 576 | * |
| 577 | * @type array $counts An array of counts for available plugin, theme, and WordPress updates. |
| 578 | * @type string $update_title Titles of available updates. |
| 579 | * } |
| 580 | * @param array $titles An array of update counts and UI strings for available updates. |
| 581 | */ |
| 582 | return apply_filters( 'wp_get_update_data', $update_data, $titles ); |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * @global string $wp_version |
| 587 | */ |
| 588 | function _maybe_update_core() { |
| 589 | global $wp_version; |
| 590 | include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version |
| 591 | |