Refine cache driver and AJAX response docs

Author: TomJaeger

docs/development/legacy/libraries/cache.md

@@ -150,6 +150,6 @@ Checks to see if appropriate extensions and resources are available for a driver
 
     ee()->cache->memcached->is_supported();
 
-You can also check database driver support:
+You can also check database driver support (it returns `FALSE` if the cache table is unavailable):
 
     ee()->cache->database->is_supported();

docs/development/legacy/libraries/output.md

@@ -163,8 +163,8 @@ NOTE: **Note:** Calling this method manually without aborting script execution w
 
 | Parameter | Type     | Description          |
 | --------- | -------- | -------------------- |
-| \$msg  | `Array` | Object to be sent to the client. |
-| \$statusCode  | `Bool|Int` | HTTP status code. If `false`, status code is `200`. If `true`, status code is 500 |
+| \$msg  | `Mixed` | Value to be encoded and sent to the client. |
+| \$statusCode  | `Bool|Int` | HTTP status code. If `false`, status code is `200`. If `true`, status code is `500`. |
 | Returns   | `Void`   | void                 |
 
 Calling this method encodes the given `$msg` parameter and sets the header `Content-Type: application/json`.
@@ -179,21 +179,21 @@ Example:
     );
     ee()->output->send_ajax_response($output);
 
-With status code (401):
+With status code (`401`):
 
-```
+```php
 $output = array(
-    'sucess' => 'false',
+    'success' => false,
     'message' => 'not allowed',
 );
 ee()->output->send_ajax_response($output, 401);
 ```
 
 As error with standard 500 error code:
 
-```
+```php
 $output = array(
-    'sucess' => 'false',
+    'success' => false,
     'message' => 'not allowed',
 );
 ee()->output->send_ajax_response($output, true);

docs/general/system-configuration-overrides.md

@@ -511,7 +511,7 @@ Specify a different [caching driver](optimization/caching.md#caching-drivers) to
 | Values    | Description                                        |
 | --------- | -------------------------------------------------- |
 | file      | File driver, /system/user/cache/ (default)         |
-| database  | Database driver, stores cache in `exp_cache`       |
+| database  | Database driver, stores cache in `{db_prefix}cache` (for example `exp_cache`) |
 | memcached | Memcached driver, configured with memcached config |
 | redis     | Redis driver, configured with redis config         |
 | dummy     | Dummy driver, will not cache                       |

docs/optimization/caching.md

@@ -93,7 +93,7 @@ By default, ExpressionEngine uses a file-based caching driver, meaning cached it
 
 ExpressionEngine also supports database, Memcached, and Redis caching drivers. You can set which driver is being used in the control panel or via the [cache_driver](general/system-configuration-overrides.md#cache_driver) config override. [Memcached](general/system-configuration-overrides.md#memcached) and [Redis](general/system-configuration-overrides.md#redis) server information can also be set in `config.php`, otherwise ExpressionEngine will try to connect to the default respective ports on localhost.
 
-The database driver stores cache rows in `exp_cache`, which can reduce filesystem I/O but adds read/write load to your database server. For higher-throughput workloads, Memcached or Redis are generally better choices.
+The database driver stores cache rows in `{db_prefix}cache` (for example `exp_cache`), which can reduce filesystem I/O but adds read/write load to your database server. For higher-throughput workloads, Memcached or Redis are generally better choices.
 
 A [backup driver](general/system-configuration-overrides.md#cache_driver_backup) can also be specified in the case your primary driver is unavailable. By default, the backup driver is the file driver and it's likely the best failover option due to its reliability, but the backup driver is configurable.