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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 |
|---|---|
| 625 | * |
| 626 | * @since 3.2.0 |
| 627 | * @since 5.1.0 Added the `$this` parameter. |
| 628 | * |
| 629 | * @global wpdb $wpdb WordPress database abstraction object. |
| 630 | * |
| 631 | * @param string $sql The SELECT FOUND_ROWS() query for the current WP_User_Query. |
| 632 | * @param WP_User_Query $query The current WP_User_Query instance. |
| 633 | */ |
| 634 | $found_users_query = apply_filters( 'found_users_query', 'SELECT FOUND_ROWS()', $this ); |
| 635 | |
| 636 | $this->total_users = (int) $wpdb->get_var( $found_users_query ); |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | if ( ! $this->results ) { |
| 641 | return; |
| 642 | } |
| 643 | |