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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 |
|---|---|
| 575 | /** |
| 576 | * Filter the URI for themes directory. |
| 577 | * |
| 578 | * @since 1.5.0 |
| 579 | * |
| 580 | * @param string $theme_root_uri The URI for themes directory. |
| 581 | * @param string $siteurl WordPress web address which is set in General Options. |
| 582 | * @param string $stylesheet_or_template Stylesheet or template name of the theme. |
| 583 | */ |
| 584 | return apply_filters( 'theme_root_uri', $theme_root_uri, get_option( 'siteurl' ), $stylesheet_or_template ); |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * Get the raw theme root relative to the content directory with no filters applied. |
| 589 | * |
| 590 | * @since 3.1.0 |
| 591 | * |
| 592 | * @param string $stylesheet_or_template The stylesheet or template name of the theme |
| 593 | * @param bool $skip_cache Optional. Whether to skip the cache. Defaults to false, meaning the cache is used. |