mb_convert_encoding function Utf-8 to GBK, space becomes question mark question

How can I resolve this? Only the space becomes a question mark, other Chinese or something is normal

Reply to discussion (solution)

This is related to your editor, the space is not a standard space
Can you
echo Base64_encode (' Your utf-8 string ');
Post the results of a view

I suspect that's not a normal space.

This is related to your editor, the space is not a standard space
Can you
echo Base64_encode (' Your utf-8 string ');
Post the results of a view
This article says this space is a bit special, is 0xc2 0xA0.
http://hi.baidu.com/lilong2114311/item/6d0b20c87ede71c8984aa097

But I'm trying to convert.

But no effect, seek advice

This is related to your editor, the space is not a standard space
Can you
echo Base64_encode (' Your utf-8 string ');
Post the results of a view

The complete code is as follows:

This is related to your editor, the space is not a standard space
Can you
echo Base64_encode (' Your utf-8 string ');
Post the results of a view

You search the page for the "Fourth generation Fire" of the "Country of Fire" Wood Leaf Ninja Village, preceded by a four question mark.

Check the source to confirm that the few are not normal space (0x20), but 0xa0:no-break space (ie nbsp)

You can't blame someone if you write it wrong.
$str = Str_replace ("0xC2 0xA0", ", $str);
should be for
$str = Str_replace ("\xc2\xa0", "', $str);

In addition, the source code has a BOM header

