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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 |
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527 | * Passing a non-empty array will result in wp_prepare_themes_for_js() returning |
528 | * early with that value instead. |
529 | * |
530 | * @since 4.2.0 |
531 | * |
532 | * @param array $prepared_themes An associative array of theme data. Default empty array. |
533 | * @param null|array $themes An array of WP_Theme objects to prepare, if any. |
534 | * @param string $current_theme The current theme slug. |
535 | */ |
536 | $prepared_themes = (array) apply_filters( 'pre_prepare_themes_for_js', array(), $themes, $current_theme ); |
537 |
|
538 | if ( ! empty( $prepared_themes ) ) { |
539 | return $prepared_themes; |
540 | } |
541 |
|
542 | // Make sure the current theme is listed first. |
543 | $prepared_themes[ $current_theme ] = array(); |
544 |
|
545 | if ( null === $themes ) { |