Description:
------------
*** Test conditions: 
Windows 10 Home 64 bit
Windows 7 Pro 64 bit
Command line charsets: cp850, cp1252, cp65001

*** PHP Version tested:
All PHP 7.2.10 versions (x64 / x86, thread safe / non thread safe)
All PHP 7.1.22 versions (x64 / x86, thread safe / non thread safe)

*** Symptoms
When executed from command line, PHP interpreter only accepts from STDIN characters with decimal code smaller than 127 of the current charset. All characters with a bigger code will be read as 0. In other words, no special character can be inputed on the command line, except the basic ASCII ones. If a special character (accented, umlauts, etc) is typed, it will be NULL.

The problem is not present if older versions of PHP are used, like PHP 7.0.32 Win32 VC14 x64 or PHP 5.x

Test script:
---------------
<?PHP

// Read string contains end line chars
$s = fgets(STDIN);
echo bin2hex($s);

// Read string doesn't contain end line chars
$s = stream_get_line(STDIN, 999999, PHP_EOL);
echo bin2hex($s);

?>

Expected result:
----------------
If, for example, the user inputs the "ò" and "à" characters, the CLI output should be (assume cp850 as charset):

ò
950d0a
à
85

Actual result:
--------------
If, for example, the user inputs the "ò" and "à" characters, the CLI output is:

ò
000d0a
à
00