Description:
------------
If I want to calculate with numbers (decimals) from an xml file/string parsed by simplexml, php does not convert these strings (e.g. "1.2") to float (1.2), it converts them to integer (1). 

Reproduce code:
---------------
<?php
$xmlstr = <<<XML
<?xml version='1.0' standalone='yes'?>
<test>
  <num>1.2</num>
  <num>0.2</num>
  <num>0.5</num>
</test>
XML;

$xml = simplexml_load_string($xmlstr);

foreach ($xml->num as $number) {
  echo $number, " * 3 = ", $number * 3, "\n";
  echo "var_dump: ", var_dump($number), "\n";
}

$number_array = array('1.2', '0.2', '0.5');

foreach ($number_array as $number) {
  echo $number, " * 3 = ", $number * 3, "\n";
  echo "var_dump: ", var_dump($number), "\n";
}
?>


Expected result:
----------------
The following loop:

foreach ($xml->num as $number) {
  echo $number, " * 3 = ", $number * 3, "\n";
}

should display:

1.2 * 3 = 3.6
0.2 * 3 = 0.6
0.5 * 3 = 1.5

(as it actually works with $number_array)

Actual result:
--------------
1.2 * 3 = 3
0.2 * 3 = 0
0.5 * 3 = 0