MDL-51784 general: Adding missing php4 style constructors

Adding them to maintain backwards compatibility.

lib/evalmath/evalmath.class.php

@@ -125,6 +125,13 @@ class EvalMath {
         $this->allowimplicitmultiplication = $allowimplicitmultiplication;
     }
 
+    /**
+     * Old syntax of class constructor. Deprecated in PHP7.
+     */
+    public function EvalMath($allowconstants = false, $allowimplicitmultiplication = false) {
+        self::__construct($allowconstants, $allowimplicitmultiplication);
+    }
+
     function e($expr) {
         return $this->evaluate($expr);
     }

lib/evalmath/readme_moodle.txt

@@ -11,9 +11,10 @@ Our changes:
 * made a function to test a string to see if it is a valid func or var name.
 * localized strings
 * added round, ceil and floor functions.
-* EvalMath::EvalMath() changed to EvalMath::__construct()
+* EvalMath::EvalMath() changed to EvalMath::__construct() and there is a new EvalMath::EvalMath
+  function to maintain backwards compatibility
 
 To see all changes diff against version 1.1, available from:
 http://www.phpclasses.org/browse/package/2695.html
 
-skodak, Tim Hunt
+skodak, Tim Hunt