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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 |
|---|---|
| 88 | |
| 89 | $dupe = $wpdb->get_results("SELECT * FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND comment_author_url = '$comment_author_url'"); |
| 90 | if ( $dupe ) |
| 91 | trackback_response(1, 'We already have a ping from that URL for this post.'); |
| 92 | |
| 93 | $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type'); |
| 94 | |
| 95 | wp_new_comment($commentdata); |
| 96 | |
| 97 | do_action('trackback_post', $wpdb->insert_id); |
| 98 | trackback_response(0); |
| 99 | } |
| 100 | ?> |
| 101 | |