diff --git a/functions.php b/functions.php
index a058505..706c36b 100644
--- a/functions.php
+++ b/functions.php
@@ -7,21 +7,29 @@
  *
  */
 function log_to_file($message, $data = false){
+    // Only proceed if a message is provided
     if ($message) {
-        $log_File = CUSTOM_DEBUG_LOG;
+        // Check if the custom log file constant is defined
+        if (defined('CUSTOM_DEBUG_LOG') && CUSTOM_DEBUG_LOG) {
+            $log_File = CUSTOM_DEBUG_LOG;
 
-        $date = new DateTime();
-        $date = $date->format("Y/m/d h:i:s");
+            $date = new DateTime();
+            $date = $date->format("Y/m/d h:i:s");
 
-        // Convert arrays and objects to JSON format
-        if (is_array($data) || is_object($data)) {
-            $data = json_encode($data, JSON_PRETTY_PRINT);
-            $message = $message . "\r\n" . $data;
-        } else if ($data) {
-            $message = $message . " " . $data;
+            // Convert arrays and objects to JSON format
+            if (is_array($data) || is_object($data)) {
+                $data = json_encode($data, JSON_PRETTY_PRINT);
+                $message = $message . "\r\n" . $data;
+            } else if ($data) {
+                $message = $message . " " . $data;
+            }
+
+            // Log the message to the specified file
+            error_log("[$date] " . $message ."\r\n", 3, $log_File);
         }
-
-        error_log("[$date] " . $message ."\r\n",3,$log_File);
+        // If CUSTOM_DEBUG_LOG is not defined, do nothing (fail silently)
+        // Alternatively, could log to default PHP error log:
+        // else { error_log("Quiztech Debug: " . $message); }
     }
 }
 
@@ -463,4 +471,4 @@ function quiztech_ajax_save_question() {
 }
 add_action( 'wp_ajax_quiztech_save_question', 'quiztech_ajax_save_question' );
 
-add_action( 'init', 'quiztech_handle_credit_purchase_submission' ); // Hook into init
+add_action( 'template_redirect', 'quiztech_handle_credit_purchase_submission' ); // Hook into template_redirect