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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 |
|---|---|
| 621 | |
| 622 | if ( $theme_roots[$stylesheet_or_template] ) |
| 623 | $theme_root = WP_CONTENT_DIR . $theme_roots[$stylesheet_or_template]; |
| 624 | else |
| 625 | $theme_root = WP_CONTENT_DIR . '/themes'; |
| 626 | } else { |
| 627 | $theme_root = WP_CONTENT_DIR . '/themes'; |
| 628 | } |
| 629 | |
| 630 | return apply_filters( 'theme_root', $theme_root ); |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * Retrieve URI for themes directory. |
| 635 | * |
| 636 | * Does not have trailing slash. |
| 637 | * |
| 638 | * @since 1.5.0 |
| 639 | * @param $stylesheet_or_template The stylesheet or template name of the theme |