Fixed error in microtime example

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@43783 c90b9560-bf6c-de11-be94-00142212c4b1

functions/datetime.xml

@@ -637,7 +637,7 @@ echo gmstrftime ("%b %d %Y %H:%M:%S", mktime (20,0,0,12,31,98))."\n";
       <programlisting role="php">
 function getmicrotime(){ 
     list($sec, $usec) = explode(" ",microtime()); 
-    return ($sec + $usec); 
+    return ((float)$usec + (float)$sec); 
     } 
 
 $time_start = getmicrotime();