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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 |
|---|---|
| 683 | if ( $stylesheet_or_template ) { |
| 684 | if ( $theme_root = get_raw_theme_root($stylesheet_or_template) ) |
| 685 | $theme_root_uri = content_url( $theme_root ); |
| 686 | else |
| 687 | $theme_root_uri = content_url( 'themes' ); |
| 688 | } else { |
| 689 | $theme_root_uri = content_url( 'themes' ); |
| 690 | } |
| 691 | |
| 692 | return apply_filters( 'theme_root_uri', $theme_root_uri, get_option('siteurl'), $stylesheet_or_template ); |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * Get the raw theme root relative to the content directory with no filters applied. |
| 697 | * |
| 698 | * @since 3.1.0 |
| 699 | * |
| 700 | * @param string $stylesheet_or_template The stylesheet or template name of the theme |
| 701 | * @return string Theme root |