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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 |
---|---|
452 | if ( $stylesheet_or_template && $theme_root = get_raw_theme_root( $stylesheet_or_template ) ) { |
453 | // Always prepend WP_CONTENT_DIR unless the root currently registered as a theme directory. |
454 | // This gives relative theme roots the benefit of the doubt when things go haywire. |
455 | if ( ! in_array( $theme_root, (array) $wp_theme_directories ) ) |
456 | $theme_root = WP_CONTENT_DIR . $theme_root; |
457 | } else { |
458 | $theme_root = WP_CONTENT_DIR . '/themes'; |
459 | } |
460 |
|
461 | return apply_filters( 'theme_root', $theme_root ); |
462 | } |
463 |
|
464 | /** |
465 | * Retrieve URI for themes directory. |
466 | * |
467 | * Does not have trailing slash. |
468 | * |
469 | * @since 1.5.0 |
470 | * |