Customizable display error flag (#3)

Author: Slamdunk

lib/ErrorHandler.php

@@ -45,6 +45,11 @@ final class ErrorHandler
      */
     private $logVariables = true;
 
+    /**
+     * @var null|bool
+     */
+    private $displayErrors;
+
     /**
      * @var callable
      */
@@ -186,6 +191,21 @@ public function logVariables(): bool
         return $this->logVariables;
     }
 
+    public function setDisplayErrors(bool $displayErrors): void
+    {
+        $this->displayErrors = $displayErrors;
+    }
+
+    public function displayErrors(): bool
+    {
+        if (null === $this->displayErrors) {
+            $this->setDisplayErrors((bool) \ini_get('display_errors'));
+            \assert(null !== $this->displayErrors);
+        }
+
+        return $this->displayErrors;
+    }
+
     /**
      * @param array<int, bool> $scream
      */
@@ -287,7 +307,7 @@ public function exceptionHandler(Throwable $exception): void
         }
         $output .= '<h1>500: Errore interno</h1>';
         $output .= \PHP_EOL;
-        if (true === (bool) \ini_get('display_errors')) {
+        if ($this->displayErrors()) {
             $currentEx = $exception;
             do {
                 $output .= \sprintf(

tests/ErrorHandlerTest.php

@@ -38,7 +38,6 @@ final class ErrorHandlerTest extends TestCase
 
     protected function setUp(): void
     {
-        \ini_set('display_errors', (string) false);
         $this->backupErrorLog = (string) \ini_get('error_log');
         $this->errorLog       = __DIR__ . \DIRECTORY_SEPARATOR . 'error_log_test';
         \touch($this->errorLog);
@@ -145,7 +144,7 @@ public function testHandleCliException(): void
 
     public function testHandleWebExceptionWithDisplay(): void
     {
-        \ini_set('display_errors', (string) true);
+        $this->errorHandler->setDisplayErrors(true);
         $this->errorHandler->setCli(false);
         $this->errorHandler->setLogErrors(true);
 
@@ -161,7 +160,7 @@ public function testHandleWebExceptionWithDisplay(): void
 
     public function testHandleWebExceptionWithoutDisplay(): void
     {
-        \ini_set('display_errors', (string) false);
+        $this->errorHandler->setDisplayErrors(false);
         $this->errorHandler->setCli(false);
         $this->errorHandler->setLogErrors(true);