diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index c6d3e950c3..99b3f9bf73 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -10,7 +10,7 @@
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Config\BootstrapConfigStorageFactory;
-use Drupal\Core\Php;
+use Drupal\Core\Requirements;
 use Drupal\Core\Logger\RfcLogLevel;
 use Drupal\Core\Test\TestDatabase;
 use Drupal\Core\Session\AccountInterface;
@@ -22,9 +22,9 @@
  * Minimum supported version of PHP.
  *
  * @deprecated in Drupal 8.5.0, will be removed before Drupal 9.0.0. Use
- *   \Drupal\Core\Php::DRUPAL_MINIMUM_PHP instead.
+ *   \Drupal\Core\Requirements::DRUPAL_MINIMUM_PHP instead.
  */
-const DRUPAL_MINIMUM_PHP = Php::DRUPAL_MINIMUM_PHP;
+const DRUPAL_MINIMUM_PHP = Requirements::DRUPAL_MINIMUM_PHP;
 
 /**
  * Minimum recommended value of PHP memory_limit.
@@ -34,9 +34,9 @@
  * 40M is the target for the Standard installation profile.
  *
  * @deprecated in Drupal 8.5.0, will be removed before Drupal 9.0.0. Use
- *   \Drupal\Core\Php::DRUPAL_MINIMUM_PHP_MEMORY_LIMIT instead.
+ *   \Drupal\Core\Requirements::DRUPAL_MINIMUM_PHP_MEMORY_LIMIT instead.
  */
-const DRUPAL_MINIMUM_PHP_MEMORY_LIMIT = Php::DRUPAL_MINIMUM_PHP_MEMORY_LIMIT;
+const DRUPAL_MINIMUM_PHP_MEMORY_LIMIT = Requirements::DRUPAL_MINIMUM_PHP_MEMORY_LIMIT;
 
 /**
  * Error reporting level: display no errors.
@@ -108,9 +108,9 @@
  * @see http://php.net/manual/language.functions.php
  *
  * @deprecated in Drupal 8.5.0, will be removed before Drupal 9.0.0. Use
- *   \Drupal\Core\Php::DRUPAL_PHP_FUNCTION_PATTERN instead.
+ *   \Drupal\Core\Requirements::DRUPAL_PHP_FUNCTION_PATTERN instead.
  */
-const DRUPAL_PHP_FUNCTION_PATTERN = Php::DRUPAL_PHP_FUNCTION_PATTERN;
+const DRUPAL_PHP_FUNCTION_PATTERN = Requirements::DRUPAL_PHP_FUNCTION_PATTERN;
 
 /**
  * $config_directories key for active directory.
diff --git a/core/lib/Drupal/Core/Extension/ThemeHandler.php b/core/lib/Drupal/Core/Extension/ThemeHandler.php
index 5e6ce466ed..00d0bef90f 100644
--- a/core/lib/Drupal/Core/Extension/ThemeHandler.php
+++ b/core/lib/Drupal/Core/Extension/ThemeHandler.php
@@ -3,7 +3,7 @@
 namespace Drupal\Core\Extension;
 
 use Drupal\Core\Config\ConfigFactoryInterface;
-use Drupal\Core\Php;
+use Drupal\Core\Requirements;
 use Drupal\Core\State\StateInterface;
 
 /**
@@ -277,7 +277,7 @@ public function rebuildThemeData() {
       'description' => '',
       'features' => $this->defaultFeatures,
       'screenshot' => 'screenshot.png',
-      'php' => Php::DRUPAL_MINIMUM_PHP,
+      'php' => Requirements::DRUPAL_MINIMUM_PHP,
       'libraries' => [],
     ];
 
diff --git a/core/lib/Drupal/Core/Php.php b/core/lib/Drupal/Core/Requirements.php
similarity index 97%
rename from core/lib/Drupal/Core/Php.php
rename to core/lib/Drupal/Core/Requirements.php
index 4d9b62694d..8bb9162600 100644
--- a/core/lib/Drupal/Core/Php.php
+++ b/core/lib/Drupal/Core/Requirements.php
@@ -5,7 +5,7 @@
 /**
  * Defines PHP-related constants for use with Drupal.
  */
-class Php {
+class Requirements {
 
   /**
    * Minimum supported version of PHP.