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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 |
|---|---|
| 222 | } |
| 223 | |
| 224 | function get_trackback_url() { |
| 225 | global $id; |
| 226 | $tb_url = get_option('siteurl') . '/wp-trackback.php?p=' . $id; |
| 227 | |
| 228 | if ( '' != get_option('permalink_structure') ) |
| 229 | $tb_url = trailingslashit(get_permalink()) . user_trailingslashit('trackback', 'single_trackback'); |
| 230 | |
| 231 | return apply_filters('trackback_url', $tb_url); |
| 232 | } |
| 233 | function trackback_url( $display = true ) { |
| 234 | if ( $display) |
| 235 | echo get_trackback_url(); |
| 236 | else |
| 237 | return get_trackback_url(); |
| 238 | } |
| 239 | |
| 240 | function trackback_rdf($timezone = 0) { |