fix: detailed error report is displayed in production environment

php > ini_set('display_errors', '0');
php > var_dump(ini_get('display_errors'));
string(1) "0"

php > ini_set('display_errors', 0);
php > var_dump(ini_get('display_errors'));
string(1) "0"

php > ini_set('display_errors', false);
php > var_dump(ini_get('display_errors'));
string(0) ""

php > ini_set('display_errors', null);
php > var_dump(ini_get('display_errors'));
string(0) ""

php > ini_set('display_errors', 'off');
php > var_dump(ini_get('display_errors'));
string(3) "off"

Author: kenjis

app/Config/Boot/development.php

@@ -7,6 +7,8 @@
  | In development, we want to show as many errors as possible to help
  | make sure they don't make it to production. And save us hours of
  | painful debugging.
+ |
+ | If you set 'display_errors' to '1', CI4's detailed error report will show.
  */
 error_reporting(-1);
 ini_set('display_errors', '1');

app/Config/Boot/production.php

@@ -6,6 +6,8 @@
  |--------------------------------------------------------------------------
  | Don't show ANY in production environments. Instead, let the system catch
  | it and display a generic error message.
+ |
+ | If you set 'display_errors' to '1', CI4's detailed error report will show.
  */
 ini_set('display_errors', '0');
 error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT & ~E_USER_NOTICE & ~E_USER_DEPRECATED);

system/Debug/ExceptionHandler.php

@@ -129,7 +129,13 @@ protected function determineView(Throwable $exception, string $templatePath): st
         // Production environments should have a custom exception file.
         $view = 'production.php';
 
-        if (str_ireplace(['off', 'none', 'no', 'false', 'null'], '', ini_get('display_errors')) !== '') {
+        if (
+            str_ireplace(
+                ['off', 'none', 'no', 'false', 'null', '0'],
+                '',
+                ini_get('display_errors')
+            ) !== ''
+        ) {
             $view = 'error_exception.php';
         }
 

system/Debug/Exceptions.php

@@ -253,7 +253,13 @@ protected function determineView(Throwable $exception, string $templatePath): st
         $view         = 'production.php';
         $templatePath = rtrim($templatePath, '\\/ ') . DIRECTORY_SEPARATOR;
 
-        if (str_ireplace(['off', 'none', 'no', 'false', 'null'], '', ini_get('display_errors')) !== '') {
+        if (
+            str_ireplace(
+                ['off', 'none', 'no', 'false', 'null', '0'],
+                '',
+                ini_get('display_errors')
+            ) !== ''
+        ) {
             $view = 'error_exception.php';
         }