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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 |
|---|---|
| 1381 | * |
| 1382 | * The dynamic portion of the hook name, `$permastructname`, refers |
| 1383 | * to the name of the registered permastruct, e.g. 'post_tag' (tags), |
| 1384 | * 'category' (categories), etc. |
| 1385 | * |
| 1386 | * @since 3.1.0 |
| 1387 | * |
| 1388 | * @param array $rules The rewrite rules generated for the current permastruct. |
| 1389 | */ |
| 1390 | $rules = apply_filters( $permastructname . '_rewrite_rules', $rules ); |
| 1391 | if ( 'post_tag' == $permastructname ) { |
| 1392 | |
| 1393 | /** |
| 1394 | * Filter rewrite rules used specifically for Tags. |
| 1395 | * |
| 1396 | * @since 2.3.0 |
| 1397 | * @deprecated 3.1.0 Use 'post_tag_rewrite_rules' instead |
| 1398 | * |
| 1399 | * @param array $rules The rewrite rules generated for tags. |