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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 |
|---|---|
| 425 | return; |
| 426 | |
| 427 | $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) ); |
| 428 | |
| 429 | do_action( 'delete_comment', $comment_ids ); |
| 430 | $wpdb->query("DELETE FROM $wpdb->comments WHERE comment_id IN ( $comma_comment_ids )"); |
| 431 | $wpdb->query("DELETE FROM $wpdb->commentmeta WHERE comment_id IN ( $comma_comment_ids )"); |
| 432 | clean_comment_cache( $comment_ids ); |
| 433 | $n = mt_rand(1, 5000); |
| 434 | if ( apply_filters('akismet_optimize_table', ($n == 11)) ) // lucky number |
| 435 | $wpdb->query("OPTIMIZE TABLE $wpdb->comments"); |
| 436 | |
| 437 | } |
| 438 | |
| 439 | function akismet_delete_old_metadata() { |
| 440 | global $wpdb; |
| 441 | |
| 442 | $now_gmt = current_time( 'mysql', 1 ); |
| 443 | $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); |