diff --git a/src/TwigExtension.php b/src/TwigExtension.php
index 2d78be7..745fe59 100644
--- a/src/TwigExtension.php
+++ b/src/TwigExtension.php
@@ -405,7 +405,7 @@ class TwigExtension extends \Twig_Extension {
       // @code
       //   {{ 'now'|date('Y') }}
       // @endcode
-      $filters[] = new \Twig_SimpleFilter('php', [$this, 'phpFilter']);
+      $filters[] = new \Twig_SimpleFilter('php', [$this, 'phpFilter'], ['needs_context' => TRUE]);
     }
     return $filters;
   }
@@ -1286,17 +1286,20 @@ class TwigExtension extends \Twig_Extension {
   /**
    * Evaluates a string of PHP code.
    *
+   * @param array $context
+   *   Twig context.
    * @param string $code
    *   Valid PHP code to be evaluated.
    *
    * @return mixed
    *   The eval() result.
    */
-  public function phpFilter($code) {
+  public function phpFilter(array $context, $code) {
+    // Make Twig variables available in PHP code.
+    extract($context);
     ob_start();
-    // @codingStandardsIgnoreStart
+    // phpcs:ignore Drupal.Functions.DiscouragedFunctions.Discouraged
     print eval($code);
-    // @codingStandardsIgnoreEnd
     $output = ob_get_contents();
     ob_end_clean();
     return $output;