Description:
------------
MSSQL BindParam with UTF8 Character in PHP 7.0.4 and PHP 7.0.7 
then UTF8 character is modified.
PHP 5.5.6 is OK. 
PHP 7.0 without bindparam and just pdo-dblib with UTF8 is ok.
PHP 7.0 with bindparam pdo-mysql UTF8 is ok.

PHP 7.0.4-7ubuntu2.1 (Ubuntu 16.04 Package)
PHP 7.0.7 (php-7.0.7.tar.gz)
Ubuntu 16.04 + PHP7.0.4 PDO_dblib + parambind(UTF8) + mssql : Fail
Ubuntu 16.04 + PHP7.0.7 PDO_dblib + parambind(UTF8) + mssql : Fail
Ubuntu 16.04 + PHP7.0.? PDO_dblib + parambind(Ansi) + mssql : OK
Ubuntu 14.04 + PHP5.5.9 PDO_dblib + parambind(UTF8) + mssql : OK
Ubuntu 16.04 + PHP7.0.4 PDO_dblib + UTF8 query + mssql : OK
Ubuntu 16.04 + PHP7.0.4 PDO_mysql + parambind(UTF8) + mysql : OK
Ubuntu 16.04 + freetds + tsql + mssql : OK

Test script:
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# with bindparam
$pdo = new PDO("dblib:host=$dbIp;dbname=$dbName;charset=UTF-8", $dbId, $dbPw);
#$username = 'username1';
$username = '한글';
$sth = $pdo->prepare("select * from test_table where username = :username");
$sth->bindParam (':username', $username);
$sth->execute();
$row = $sth->fetch(PDO::FETCH_OBJ);
var_dump($row);

#without bindparam
$pdo = new PDO("dblib:host=$dbIp;dbname=$dbName;charset=UTF-8", $dbId, $dbPw);
#$username = 'username1';
$username = "'" . "한글" . "'";
$sth = $pdo->prepare("select * from test_table where username = $username");
$sth->execute();
$row = $sth->fetch(PDO::FETCH_OBJ);
var_dump($row);

Expected result:
----------------
freetds debug log and MSSQL Profiler log is following
select * from test_table where username = '한글'

Actual result:
--------------
freetds debug log and MSSQL Profiler log is following
select * from test_table where username = 0x27ed959ceab88027