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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 |
|---|---|
| 644 | /** |
| 645 | * Filters the URI for themes directory. |
| 646 | * |
| 647 | * @since 1.5.0 |
| 648 | * |
| 649 | * @param string $theme_root_uri The URI for themes directory. |
| 650 | * @param string $siteurl WordPress web address which is set in General Options. |
| 651 | * @param string $stylesheet_or_template The stylesheet or template name of the theme. |
| 652 | */ |
| 653 | return apply_filters( 'theme_root_uri', $theme_root_uri, get_option( 'siteurl' ), $stylesheet_or_template ); |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * Get the raw theme root relative to the content directory with no filters applied. |
| 658 | * |
| 659 | * @since 3.1.0 |
| 660 | * |
| 661 | * @global array $wp_theme_directories |
| 662 | * |