Description:
------------
The string used as an array, anyway the key(string) is, the result is the first character of the string.


Test script:
---------------
$a = '844';
echo $a['id']; 



Expected result:
----------------
PHP Warning:  Illegal string offset 'id' in E:\xx\index.php on line 3
Warning: Illegal string offset 'id' in E:\xx\index.php on line 3
result: ''

Actual result:
--------------
PHP Warning:  Illegal string offset 'id' in E:\xx\index.php on line 3
Warning: Illegal string offset 'id' in E:\xx\index.php on line 3
result: 8