added Uri::getAllHeaders() compatibility

CHANGELOG.md

@@ -1,6 +1,8 @@
 # v1.7.0-rc.17
 ## mm/dd/2020
 
+1. [](#new)
+    * Added a `getAllHeaders()` compatibility function
 1. [](#improved)
     * Fall back through various templates scenarios if they don't exist in theme to avoid unhelpful error.
     * Added default templates for `external.html.twig`, `default.html.twig`, and `modular.html.twig`

system/src/Grav/Common/Uri.php

@@ -1436,6 +1436,24 @@ class Uri
         return $this;
     }
 
+
+    /**
+     * Compatibility in case getallheaders() is not available on platform
+     */
+    public static function getAllHeaders()
+    {
+        if (!function_exists('getallheaders')) {
+            $headers = [];
+            foreach ($_SERVER as $name => $value) {
+                if (substr($name, 0, 5) == 'HTTP_') {
+                    $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
+                }
+            }
+            return $headers;
+        }
+        return getallheaders();
+    }
+
     /**
      * Get the base URI with port if needed
      *