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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 |
|---|---|
| 3320 | $post_id = $post->ID; |
| 3321 | |
| 3322 | /** |
| 3323 | * Fires before comments are sent to the Trash. |
| 3324 | * |
| 3325 | * @since 2.9.0 |
| 3326 | * |
| 3327 | * @param int $post_id Post ID. |
| 3328 | */ |
| 3329 | do_action( 'trash_post_comments', $post_id ); |
| 3330 | |
| 3331 | $comments = $wpdb->get_results( $wpdb->prepare( "SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ) ); |
| 3332 | if ( empty( $comments ) ) { |
| 3333 | return; |
| 3334 | } |
| 3335 | |
| 3336 | // Cache current status for each comment. |
| 3337 | $statuses = array(); |
| 3338 | foreach ( $comments as $comment ) { |