Index: /trunk/src/wp-includes/class-wp-paused-extensions-storage.php
===================================================================
--- /trunk/src/wp-includes/class-wp-paused-extensions-storage.php	(revision 61442)
+++ /trunk/src/wp-includes/class-wp-paused-extensions-storage.php	(revision 61443)
@@ -162,5 +162,5 @@
 		$paused_extensions = (array) get_option( $option_name, array() );
 
-		return isset( $paused_extensions[ $this->type ] ) ? $paused_extensions[ $this->type ] : array();
+		return $paused_extensions[ $this->type ] ?? array();
 	}
 
Index: /trunk/src/wp-includes/error-protection.php
===================================================================
--- /trunk/src/wp-includes/error-protection.php	(revision 61442)
+++ /trunk/src/wp-includes/error-protection.php	(revision 61443)
@@ -47,5 +47,5 @@
 function wp_get_extension_error_description( $error ) {
 	$constants   = get_defined_constants( true );
-	$constants   = isset( $constants['Core'] ) ? $constants['Core'] : $constants['internal'];
+	$constants   = $constants['Core'] ?? $constants['internal'];
 	$core_errors = array();
 
Index: /trunk/src/wp-includes/load.php
===================================================================
--- /trunk/src/wp-includes/load.php	(revision 61442)
+++ /trunk/src/wp-includes/load.php	(revision 61443)
@@ -14,5 +14,5 @@
  */
 function wp_get_server_protocol() {
-	$protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : '';
+	$protocol = $_SERVER['SERVER_PROTOCOL'] ?? '';
 
 	if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0', 'HTTP/3' ), true ) ) {
@@ -116,5 +116,5 @@
 
 	// From our prior conditional, one of these must be set.
-	$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
+	$header = $_SERVER['HTTP_AUTHORIZATION'] ?? $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
 
 	// Test to make sure the pattern matches expected.