Unknown square when returning query results?

Question

PHP

I load json with Ajax from php, { "error":false } - invalid json as the validator writes.



I type the same thing with my hands:

Already valid I

find at the beginning of the line


PHP seems to be sending valid json, files in normal encoding.

What is this square?

Answer 1

Precisely files in the normal coding? not some BOM utf8 ? (check the first character in your source with a hex editor)

Answer 2

http://en.wikipedia.org/wiki/Byte_order_mark
Recode the file to utf-8 without BOM.