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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 |
|---|---|
| 1678 | * |
| 1679 | * The dynamic portion of the hook name, `$permastructname`, refers |
| 1680 | * to the name of the registered permastruct, e.g. 'post_tag' (tags), |
| 1681 | * 'category' (categories), etc. |
| 1682 | * |
| 1683 | * @since 3.1.0 |
| 1684 | * |
| 1685 | * @param array $rules The rewrite rules generated for the current permastruct. |
| 1686 | */ |
| 1687 | $rules = apply_filters( $permastructname . '_rewrite_rules', $rules ); |
| 1688 | if ( 'post_tag' == $permastructname ) { |
| 1689 | |
| 1690 | /** |
| 1691 | * Filter rewrite rules used specifically for Tags. |
| 1692 | * |
| 1693 | * @since 2.3.0 |
| 1694 | * @deprecated 3.1.0 Use 'post_tag_rewrite_rules' instead |
| 1695 | * |
| 1696 | * @param array $rules The rewrite rules generated for tags. |