[fix] #11509: numerical input option integer only leads to positive i…

…nteger input only

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Change Log
 Only partial changelog, [commit history](https://framagit.org/Shnoulle/LimeSurvey/commits/2.06_SondagesPro) show all changelog.
 
+## unreleased
+
+### Fix
+- Fixed issue #11509: numerical input option integer only leads to positive integer input only
+
 ## [1.0.23] - 2016-07-17
 
 ### Feature

application/helpers/expressions/em_core_helper.php

@@ -2744,9 +2744,12 @@ function exprmgr_if($test,$ok,$error)
 function exprmgr_int($arg)
 {
     if(strpos($arg,"."))
+    {
         $arg=preg_replace("/\.$/","",rtrim(strval($arg),"0"));// DECIMAL from SQL return always .00000000, the remove all 0 and one . , see #09550
-    return (ctype_digit($arg));// Accept empty value too before PHP 5.1 see http://php.net/ctype-digit#refsect1-function.ctype-digit-changelog
+    }
+    return (preg_match("/^-?[0-9]*$/",$arg));// Allow 000 for value, @link https://bugs.limesurvey.org/view.php?id=9550 DECIMAL sql type.
 }
+
 /**
  * Join together $args[0-N] with ', '
  * @param <type> $args