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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 |
---|---|
656 |
|
657 | if ( ! empty( $theme_roots[$stylesheet_or_template] ) ) |
658 | $theme_root = WP_CONTENT_DIR . $theme_roots[$stylesheet_or_template]; |
659 | else |
660 | $theme_root = WP_CONTENT_DIR . '/themes'; |
661 | } else { |
662 | $theme_root = WP_CONTENT_DIR . '/themes'; |
663 | } |
664 |
|
665 | return apply_filters( 'theme_root', $theme_root ); |
666 | } |
667 |
|
668 | /** |
669 | * Retrieve URI for themes directory. |
670 | * |
671 | * Does not have trailing slash. |
672 | * |
673 | * @since 1.5.0 |
674 | * @param $stylesheet_or_template The stylesheet or template name of the theme |