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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 |
|---|---|
| 3326 | if ( ! empty( $limits ) ) { |
| 3327 | /** |
| 3328 | * Filters the query to run for retrieving the found posts. |
| 3329 | * |
| 3330 | * @since 2.1.0 |
| 3331 | * |
| 3332 | * @param string $found_posts_query The query to run to find the found posts. |
| 3333 | * @param WP_Query $query The WP_Query instance (passed by reference). |
| 3334 | */ |
| 3335 | $found_posts_query = apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ); |
| 3336 | |
| 3337 | $this->found_posts = (int) $wpdb->get_var( $found_posts_query ); |
| 3338 | } else { |
| 3339 | if ( is_array( $this->posts ) ) { |
| 3340 | $this->found_posts = count( $this->posts ); |
| 3341 | } else { |
| 3342 | if ( null === $this->posts ) { |
| 3343 | $this->found_posts = 0; |
| 3344 | } else { |