diff --git a/core/.DS_Store b/core/.DS_Store
new file mode 100644
index 0000000..90b7401
Binary files /dev/null and b/core/.DS_Store differ
diff --git a/core/misc/.DS_Store b/core/misc/.DS_Store
new file mode 100644
index 0000000..608a3e2
Binary files /dev/null and b/core/misc/.DS_Store differ
diff --git a/core/misc/icons/.DS_Store b/core/misc/icons/.DS_Store
new file mode 100644
index 0000000..a92e084
Binary files /dev/null and b/core/misc/icons/.DS_Store differ
diff --git a/core/modules/system/src/SystemRequirements.php b/core/modules/system/src/SystemRequirements.php
index ecaf0cf..bdc2685 100644
--- a/core/modules/system/src/SystemRequirements.php
+++ b/core/modules/system/src/SystemRequirements.php
@@ -13,6 +13,21 @@
 class SystemRequirements {
 
   /**
+   * The minimum PHP version in the lower range
+   */
+  public static $min_low = '5.5.21';
+
+  /**
+   * The maximum PHP version in the lower range
+   */
+  public static $max_low = '5.6.0';
+
+  /**
+   * The minimum PHP version in the higher range
+   */
+  public static $min_high = '5.6.5';
+
+  /**
    * Determines whether the passed in PHP version disallows multiple statements.
    *
    * @param string $phpversion
@@ -22,8 +37,8 @@ class SystemRequirements {
   public static function phpVersionWithPdoDisallowMultipleStatements($phpversion) {
     // PDO::MYSQL_ATTR_MULTI_STATEMENTS was introduced in PHP versions 5.5.21
     // and 5.6.5.
-    return (version_compare($phpversion, '5.5.21', '>=') && version_compare($phpversion, '5.6.0', '<'))
-      || version_compare($phpversion, '5.6.5', '>=');
+    return (version_compare($phpversion, self::$min_low, '>=') && version_compare($phpversion, self::$max_low, '<'))
+      || version_compare($phpversion, self::$min_high, '>=');
   }
 
 }
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 62e5082..964aa37 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -86,10 +86,8 @@ function system_requirements($phase) {
     return $requirements;
   }
   elseif (($phase === 'install' || \Drupal::database()->driver() === 'mysql') && !SystemRequirements::phpVersionWithPdoDisallowMultipleStatements($phpversion)) {
-    // Suggest to update to at least 5.5.21 or 5.6.5 for disabling multiple
-    // statements.
     $requirements['php']['title'] = t('PHP (multiple statement disabling)');
-    $requirements['php']['description'] = t('PHP versions higher than 5.6.5 or 5.5.21 provide built-in SQL injection protection for mysql databases. It is recommended to update.');
+    $requirements['php']['description'] = t('PHP versions higher than %min_low or %min_high provide built-in SQL injection protection for mysql databases. It is recommended to update.', array('%min_low' => SystemRequirements::$min_low, '%min_high' => SystemRequirements::$min_high));
     $requirements['php']['severity'] = REQUIREMENT_INFO;
   }
   elseif (version_compare($phpversion, DRUPAL_SUGGESTED_PHP) < 0) {