diff --git a/language/operators.xml b/language/operators.xml
index d091b1144b..1755d6230e 100644
--- a/language/operators.xml
+++ b/language/operators.xml
@@ -225,15 +225,16 @@
 <![CDATA[
 <?php
 $a = 3 * 3 % 5; // (3 * 3) % 5 = 4
+// ternary operator associativity differs form C/C++
 $a = true ? 0 : true ? 1 : 2; // (true ? 0 : true) ? 1 : 2 = 2
 
 $a = 1;
 $b = 2;
 $a = $b += 3; // $a = ($b += 3) -> $a = 5, $b = 5
 
-// mixing ++ and + produces undefined behavior
+// mixing ++ and +
 $a = 1;
-echo ++$a + $a++; // may print 4 or 5
+echo ++$a + $a++; // same as ++$a; $a + $a; $a++; print 4
 ?>
 ]]>
      </programlisting>