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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 |
|---|---|
| 3227 | if ( ! empty( $limits ) ) { |
| 3228 | /** |
| 3229 | * Filters the query to run for retrieving the found posts. |
| 3230 | * |
| 3231 | * @since 2.1.0 |
| 3232 | * |
| 3233 | * @param string $found_posts The query to run to find the found posts. |
| 3234 | * @param WP_Query $this The WP_Query instance (passed by reference). |
| 3235 | */ |
| 3236 | $this->found_posts = $wpdb->get_var( apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ) ); |
| 3237 | } else { |
| 3238 | if ( is_array( $this->posts ) ) { |
| 3239 | $this->found_posts = count( $this->posts ); |
| 3240 | } else { |
| 3241 | if ( null === $this->posts ) { |
| 3242 | $this->found_posts = 0; |
| 3243 | } else { |
| 3244 | $this->found_posts = 1; |
| 3245 | } |