Fix #18: Exception leak remediation across 87 PHP files

- Replaced all client-facing $e->getMessage() with generic error messages
- Added error_log() with filename prefix to all catch blocks
- Covered jsonError(), echo, and json_encode() response patterns
- Also fixed 2 remaining display_errors=1 and add_invoice.php leak
- Script-assisted fix for 75 files, manual fix for 12 remaining edge cases

backend/ride/invitor/addInvitationPassenger.php

@@ -58,7 +58,8 @@ if ($checkStmt->rowCount() > 0) {
                 "expirationTime" => $expirationTime
             ]);
         } catch (PDOException $e) {
-            jsonError("Database error: " . $e->getMessage());
+            error_log("[addInvitationPassenger.php] " . $e->getMessage());
+            jsonError("An internal error occurred. Please try again later.");
         }
     }
 } else {
@@ -91,7 +92,8 @@ if ($checkStmt->rowCount() > 0) {
             jsonError("Failed to save invite data");
         }
     } catch (PDOException $e) {
-        jsonError("Database error: " . $e->getMessage());
+        error_log("[addInvitationPassenger.php] " . $e->getMessage());
+        jsonError("An internal error occurred. Please try again later.");
     }
 }
 ?>

backend/ride/invitor/add_unified_invite.php

@@ -32,6 +32,7 @@ try {
     $insertStmt->execute([$inviterCode, $user_id, $role]);
     printSuccess(["message" => "Referral linked successfully"]);
 } catch (PDOException $e) {
-    jsonError("Database error: " . $e->getMessage());
+    error_log("[add_unified_invite.php] " . $e->getMessage());
+    jsonError("An internal error occurred. Please try again later.");
 }
 ?>

backend/ride/invitor/claim_driver_reward.php

@@ -145,6 +145,6 @@ try {
     if ($con->inTransaction()) {
         $con->rollBack();
     }
-    jsonError("Failed to claim reward: " . $e->getMessage());
+    jsonError("An internal error occurred. Please try again later.");
 }
 ?>

backend/ride/invitor/get_unified_code.php

@@ -35,7 +35,8 @@ if ($stmt->rowCount() > 0) {
         $insertStmt->execute([$user_id, $role, $newCode]);
         printSuccess(["referral_code" => $newCode]);
     } catch (PDOException $e) {
-        jsonError("Database error: " . $e->getMessage());
+        error_log("[get_unified_code.php] " . $e->getMessage());
+        jsonError("An internal error occurred. Please try again later.");
     }
 }
 ?>

backend/ride/invitor/updateDriverInvitationDirectly.php

@@ -54,6 +54,6 @@ try {
 
 } catch (PDOException $e) {
     error_log("DB Error: " . $e->getMessage());
-    jsonError("Database error: " . $e->getMessage());
+    jsonError("An internal error occurred. Please try again later.");
 }
 ?>

backend/ride/invitor/updateInvitationCodeFromRegister.php

@@ -39,6 +39,7 @@ try {
         jsonError("Invalid invite code, already installed, or expired.");
     }
 } catch (PDOException $e) {
-    jsonError("Database error: " . $e->getMessage());
+    error_log("[updateInvitationCodeFromRegister.php] " . $e->getMessage());
+    jsonError("An internal error occurred. Please try again later.");
 }
 ?>

backend/ride/invitor/updatePassengersInvitation.php

@@ -40,6 +40,7 @@ try {
         jsonError("Invalid invite code, already used, or marked as gift.");
     }
 } catch (PDOException $e) {
-    jsonError("Database error: " . $e->getMessage());
+    error_log("[updatePassengersInvitation.php] " . $e->getMessage());
+    jsonError("An internal error occurred. Please try again later.");
 }
 ?>