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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 |
|---|---|
| 3505 | if ( ! empty( $limits ) ) { |
| 3506 | /** |
| 3507 | * Filters the query to run for retrieving the found posts. |
| 3508 | * |
| 3509 | * @since 2.1.0 |
| 3510 | * |
| 3511 | * @param string $found_posts_query The query to run to find the found posts. |
| 3512 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 3513 | */ |
| 3514 | $found_posts_query = apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ); |
| 3515 | |
| 3516 | $this->found_posts = (int) $wpdb->get_var( $found_posts_query ); |
| 3517 | } else { |
| 3518 | if ( is_array( $this->posts ) ) { |
| 3519 | $this->found_posts = count( $this->posts ); |
| 3520 | } else { |
| 3521 | if ( null === $this->posts ) { |
| 3522 | $this->found_posts = 0; |
| 3523 | } else { |