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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 |
|---|---|
| 410 | } |
| 411 | |
| 412 | if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number |
| 413 | $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}"); |
| 414 | } |
| 415 | |
| 416 | public static function delete_old_comments_meta() { |
| 417 | global $wpdb; |
| 418 | |
| 419 | $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); |
| 420 | |
| 421 | # enforce a minimum of 1 day |
| 422 | $interval = absint( $interval ); |
| 423 | if ( $interval < 1 ) |
| 424 | $interval = 1; |
| 425 | |
| 426 | // akismet_as_submitted meta values are large, so expire them |
| 427 | // after $interval days regardless of the comment status |
| 428 | while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT m.comment_id FROM {$wpdb->commentmeta} as m INNER JOIN {$wpdb->comments} as c USING(comment_id) WHERE m.meta_key = 'akismet_as_submitted' AND DATE_SUB(NOW(), INTERVAL %d DAY) > c.comment_date_gmt LIMIT 10000", $interval ) ) ) { |