improved readability

README.md

@@ -11,7 +11,7 @@ This software should make it simple to use pre-rendered map tiles in your own pr
 
 Download project files and upload it into your web hosting of your choice.
 
-Open the **"proxy-test.html"** within your browser, your proxy server should display you a simple slippy maps rendering default Open Street Map tiles.
+Open the **"test.html"** file within your browser, your proxy server should display you a simple slippy maps rendering default Open Street Map tiles.
 Or test directly  in your browser with a tile URL such as: http://www.example.com/tiles/15/17024/10792.png
 
 **NB.** Remeber to check your web server folder permissions: **777** or **755**
@@ -36,7 +36,7 @@ Or test directly  in your browser with a tile URL such as: http://www.example.co
     $tiles_config['servers'] = array(
       'osm'  => 'https://{switch:a,b,c}.tile.openstreetmap.org/{z}/{x}/{y}.png',
       'otm'  => 'https://{switch:a,b,c}.tile.opentopomap.org/{z}/{x}/{y}.png',
-      // ADD: more services here
+      // ADD: more services here.
     );
 
     /**
@@ -52,7 +52,7 @@ Or test directly  in your browser with a tile URL such as: http://www.example.co
      * @var string
      */
     // CHANGE: bounding box cache-area to fit your own needs
-    $tiles_config['bbox'] = '6.602696,35.07638,19.12499,47.10169'; // Italy tiles are cached, others are proxied!
+    $tiles_config['bbox'] = '6.602696,35.07638,19.12499,47.10169'; // CHANGE: bbox tiles (Italy) are cached, others are proxied!
 
     /**
      * Cache timeout in seconds

config.php

@@ -11,11 +11,14 @@
 /**
  * Whitelist of supported tile servers
  *
+ * @link https://wiki.openstreetmap.org/wiki/Tile_servers
+ *
  * @var array
  */
-$tiles_config['servers'] = array(
+$config['servers'] = array(
 	'osm' => 'https://{switch:a,b,c}.tile.openstreetmap.org/{z}/{x}/{y}.png',
 	'otm' => 'https://{switch:a,b,c}.tile.opentopomap.org/{z}/{x}/{y}.png',
+	// ADD: more services here.
 );
 
 /**
@@ -30,7 +33,7 @@ $tiles_config['servers'] = array(
  *
  * @var string
  */
-$tiles_config['bbox'] = '6.602696,35.07638,19.12499,47.10169'; // Italy.
+$config['bbox'] = '6.602696,35.07638,19.12499,47.10169'; // CHANGE: bbox tiles (Italy) are cached, others are proxied!
 
 /**
  * Cache timeout in seconds
@@ -41,13 +44,13 @@ $tiles_config['bbox'] = '6.602696,35.07638,19.12499,47.10169'; // Italy.
  *
  * @var int
  */
-$tiles_config['ttl'] = 86400;
+$config['ttl'] = 86400;
 
 /**
  * Custom Proxy Server headers
  *
  * @var string
  */
-$tiles_config['headers'] = array(
+$config['headers'] = array(
 	'Access-Control-Allow-Origin:' => '*',
 );

index.php

@@ -15,18 +15,20 @@
  * @license   https://www.gnu.org/licenses/gpl-3.0.txt GNU/GPLv3
  */
 
+// TODO: code refactoring ( wrap it within a dedicated class.. )
+
 // User configs.
 require_once 'config.php';
 
 // Default configs.
-$servers = @$tiles_config['servers'] ?: array(
+$servers = @$config['servers'] ?: array(
 	'osm' => 'https://{switch:a,b,c}.tile.openstreetmap.org/{z}/{x}/{y}.png',
 	'otm' => 'https://{switch:a,b,c}.tile.opentopomap.org/{z}/{x}/{y}.png',
 );
-$bbox    = @$tiles_config['bbox'] ?: '-180,-90,180,90';
-$ttl     = @$tiles_config['ttl'] ?: 86400;
+$bbox    = @$config['bbox'] ?: '-180,-90,180,90';
+$ttl     = @$config['ttl'] ?: 86400;
 $headers = array_change_key_case(
-	@$tiles_config['headers'] ?: array(
+	@$config['headers'] ?: array(
 		'Access-Control-Allow-Origin:' => '*',
 	), CASE_LOWER
 );