diff --git a/src/wp-includes/class-wp-customize-manager.php b/src/wp-includes/class-wp-customize-manager.php
index 9cdd288aa5..1948e7a794 100644
--- a/src/wp-includes/class-wp-customize-manager.php
+++ b/src/wp-includes/class-wp-customize-manager.php
@@ -1229,7 +1229,7 @@ final class WP_Customize_Manager {
 					$widget_numbers = array_keys( $settings );
 					if ( count( $widget_numbers ) > 0 ) {
 						$widget_numbers[]               = 1;
-						$max_widget_numbers[ $id_base ] = call_user_func_array( 'max', $widget_numbers );
+						$max_widget_numbers[ $id_base ] = max( ...$widget_numbers );
 					} else {
 						$max_widget_numbers[ $id_base ] = 1;
 					}
diff --git a/src/wp-includes/class-wp-customize-panel.php b/src/wp-includes/class-wp-customize-panel.php
index 8a227cd70d..82eda3a0f6 100644
--- a/src/wp-includes/class-wp-customize-panel.php
+++ b/src/wp-includes/class-wp-customize-panel.php
@@ -224,11 +224,11 @@ class WP_Customize_Panel {
 	 * @return bool False if theme doesn't support the panel or the user doesn't have the capability.
 	 */
 	final public function check_capabilities() {
-		if ( $this->capability && ! call_user_func_array( 'current_user_can', (array) $this->capability ) ) {
+		if ( $this->capability && ! current_user_can( $this->capability ) ) {
 			return false;
 		}
 
-		if ( $this->theme_supports && ! call_user_func_array( 'current_theme_supports', (array) $this->theme_supports ) ) {
+		if ( $this->theme_supports && ! current_theme_supports( ... (array) $this->theme_supports ) ) {
 			return false;
 		}
 
diff --git a/src/wp-includes/class-wp-customize-section.php b/src/wp-includes/class-wp-customize-section.php
index ae90127cca..26313a7401 100644
--- a/src/wp-includes/class-wp-customize-section.php
+++ b/src/wp-includes/class-wp-customize-section.php
@@ -242,11 +242,11 @@ class WP_Customize_Section {
 	 * @return bool False if theme doesn't support the section or user doesn't have the capability.
 	 */
 	final public function check_capabilities() {
-		if ( $this->capability && ! call_user_func_array( 'current_user_can', (array) $this->capability ) ) {
+		if ( $this->capability && ! current_user_can( $this->capability ) ) {
 			return false;
 		}
 
-		if ( $this->theme_supports && ! call_user_func_array( 'current_theme_supports', (array) $this->theme_supports ) ) {
+		if ( $this->theme_supports && ! current_theme_supports( ... (array) $this->theme_supports ) ) {
 			return false;
 		}
 
diff --git a/src/wp-includes/class-wp-customize-setting.php b/src/wp-includes/class-wp-customize-setting.php
index 3e0a1c0770..08d5b1c348 100644
--- a/src/wp-includes/class-wp-customize-setting.php
+++ b/src/wp-includes/class-wp-customize-setting.php
@@ -815,11 +815,11 @@ class WP_Customize_Setting {
 	 * @return bool False if theme doesn't support the setting or user can't change setting, otherwise true.
 	 */
 	final public function check_capabilities() {
-		if ( $this->capability && ! call_user_func_array( 'current_user_can', (array) $this->capability ) ) {
+		if ( $this->capability && ! current_user_can( $this->capability ) ) {
 			return false;
 		}
 
-		if ( $this->theme_supports && ! call_user_func_array( 'current_theme_supports', (array) $this->theme_supports ) ) {
+		if ( $this->theme_supports && ! current_theme_supports( ... (array) $this->theme_supports ) ) {
 			return false;
 		}
 
diff --git a/src/wp-includes/class-wp-customize-widgets.php b/src/wp-includes/class-wp-customize-widgets.php
index 86cf889ee5..1a0ae316e9 100644
--- a/src/wp-includes/class-wp-customize-widgets.php
+++ b/src/wp-includes/class-wp-customize-widgets.php
@@ -1050,7 +1050,7 @@ final class WP_Customize_Widgets {
 		$args[0]['before_widget_content'] = '<div class="widget-content">';
 		$args[0]['after_widget_content']  = '</div><!-- .widget-content -->';
 		ob_start();
-		call_user_func_array( 'wp_widget_control', $args );
+		wp_widget_control( ...$args );
 		$control_tpl = ob_get_clean();
 		return $control_tpl;
 	}