MDL-17868 detection of incorrect hadnling of floats in version numbers - this should prevent dataloss in case it does not work as expected

2009-01-13 09:02:01 +00:00
parent c1321f6c40
commit b02e348184
3 changed files with 17 additions and 0 deletions
@@ -749,6 +749,18 @@ function admin_critical_warnings_present() {
    return $SESSION->admin_critical_warning;
 }

+/**
+ * Detects if float support at least 10 deciman digits
+ * and also if float-->string conversion works as expected.
+ * @return bool true if problem found
+ */
+function is_float_problem() {
+    $num1 = 2009010200.01;
+    $num2 = 2009010200.02;
+
+    return ((string)$num1 === (string)$num2 or $num1 === $num2 or $num2 <= (string)$num1);
+}
+
 /**
 * Try to verify that dataroot is not accessible from web.
 * It is not 100% correct but might help to reduce number of vulnerable sites.