Description:
------------
when a chinese charactor "??" is the last letter of a word that equals to a varibale. An error occurred.

Reproduce code:
---------------
<?php 
$test="?o??????";
echo $test;
?>

Expected result:
----------------
?o??????

Actual result:
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Parse error: syntax error, unexpected $end in C:\Inetpub\wwwroot\test.php on line 4