1 files changed, 12 insertions, 1 deletions
diff --git a/apps/testing/lib/Provider/FakeTextProcessingProvider.php b/apps/testing/lib/Provider/FakeTextProcessingProvider.php
index 7a318196ab3..ffa7d16ef24 100644
--- a/apps/testing/lib/Provider/FakeTextProcessingProvider.php
+++ b/apps/testing/lib/Provider/FakeTextProcessingProvider.php
@@ -18,10 +18,21 @@ class FakeTextProcessingProvider implements IProvider {
 	}
 
 	public function process(string $prompt): string {
-		return strrev($prompt) . ' (done with FakeTextProcessingProvider)';
+		return $this->mb_strrev($prompt) . ' (done with FakeTextProcessingProvider)';
 	}
 
 	public function getTaskType(): string {
 		return FreePromptTaskType::class;
 	}
+
+	/**
+	 * Reverse a miltibyte string.
+	 *
+	 * @param string $string The string to be reversed.
+	 * @return string The reversed string
+	 */
+	private function mb_strrev(string $string): string {
+		$chars = mb_str_split($string, 1);
+		return implode('', array_reverse($chars));
+	}
 }