From 218e4d56e6cd205190a1c9493c29ba66c7c3ad07 Mon Sep 17 00:00:00 2001
From: moodler <moodler>
Date: Mon, 23 Aug 2004 13:49:19 +0000
Subject: [PATCH] Lowercase formulas before parsing them

---
 mod/quiz/questiontypes/calculated/questiontype.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mod/quiz/questiontypes/calculated/questiontype.php b/mod/quiz/questiontypes/calculated/questiontype.php
index a253fa1c37..73c392868a 100644
--- a/mod/quiz/questiontypes/calculated/questiontype.php
+++ b/mod/quiz/questiontypes/calculated/questiontype.php
@@ -537,12 +537,13 @@ function quiz_qtype_calculated_find_formula_errors($formula) {
         $formula = str_replace($regs[0], '1', $formula);
     }
 
-    // Strip away empty space
-    $formula = str_replace(' ', '', $formula);
+    // Strip away empty space and lowercase it
+    $formula = strtolower(str_replace(' ', '', $formula));
 
     $safeoperatorchar = '-+/*%>:^~<?=&|!';
     $operatorornumber = "[$safeoperatorchar.0-9eE]";
 
+
     while (ereg("(^|[$safeoperatorchar,(])([a-z0-9_]*)\\(($operatorornumber+(,$operatorornumber+((,$operatorornumber+)+)?)?)?\\)",
             $formula, $regs)) {
 
-- 
2.39.5