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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 |
|---|---|
| 389 | $delete_interval = max( 1, intval( $delete_interval ) ); |
| 390 | |
| 391 | while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_id FROM {$wpdb->comments} WHERE DATE_SUB(NOW(), INTERVAL %d DAY) > comment_date_gmt AND comment_approved = 'spam' LIMIT %d", $delete_interval, $delete_limit ) ) ) { |
| 392 | if ( empty( $comment_ids ) ) |
| 393 | return; |
| 394 | |
| 395 | $wpdb->queries = array(); |
| 396 | |
| 397 | foreach ( $comment_ids as $comment_id ) { |
| 398 | do_action( 'delete_comment', $comment_id ); |
| 399 | do_action( 'akismet_batch_delete_count', __FUNCTION__ ); |
| 400 | } |
| 401 | |
| 402 | // Prepared as strings since comment_id is an unsigned BIGINT, and using %d will constrain the value to the maximum signed BIGINT. |
| 403 | $format_string = implode( ", ", array_fill( 0, count( $comment_ids ), '%s' ) ); |
| 404 | |
| 405 | $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->comments} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); |
| 406 | $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); |
| 407 | |