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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 |
---|---|
2146 | function wp_trash_post_comments($post = null) { |
2147 | global $wpdb; |
2148 |
|
2149 | $post = get_post($post); |
2150 | if ( empty($post) ) |
2151 | return; |
2152 |
|
2153 | $post_id = $post->ID; |
2154 |
|
2155 | do_action('trash_post_comments', $post_id); |
2156 |
|
2157 | $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) ); |
2158 | if ( empty($comments) ) |
2159 | return; |
2160 |
|
2161 | // Cache current status for each comment |
2162 | $statuses = array(); |
2163 | foreach ( $comments as $comment ) |
2164 | $statuses[$comment->comment_ID] = $comment->comment_approved; |