Description:
------------
http://php.net/trigger_error

The description of the error_msg parameter says "It's limited to 1024 characters 
in length." but actually it's limited to 1024 bytes instead of characters.


Test script:
---------------
$m = str_repeat('Ä', 510) . '0123456789';

var_dump(strlen($m));             // 520 (= 510 + 10) characters
var_dump(mb_strlen($m,'UTF-8'));  // ... but 1030 (= 510*2 + 10) bytes in UTF-8

trigger_error($m);


Expected result:
----------------
int(1030)
int(520)
PHP Notice:  Ä ... Ä0123456789 in (filename)

Actual result:
--------------
int(1030)
int(520)
PHP Notice:  Ä ... Ä0123 in (filename)