Description:
------------
I try this code and my results are weird.

-- 
Reivax


Reproduce code:
---------------
<?php
//$_GET['float40'] = 'E2';
//$_GET['float41'] = '10E';
//$_GET['float42'] = '2E-';
//$_GET['float43'] = 'E-2';
//$_GET['float44'] = '+E2';

var_dump(filter_data($_GET['float40'], FILTER_VALIDATE_FLOAT));
var_dump(filter_data($_GET['float41'], FILTER_VALIDATE_FLOAT));
var_dump(filter_data($_GET['float42'], FILTER_VALIDATE_FLOAT));
var_dump(filter_data($_GET['float43'], FILTER_VALIDATE_FLOAT));
var_dump(filter_data($_GET['float44'], FILTER_VALIDATE_FLOAT));
?>


Expected result:
----------------
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)


Actual result:
--------------
float(21) //float40
float(10) //float41
float(2) //float42
float(21) //float43
float(0) //float44