On the problem of Htmlspecialchars entity character transcoding

PHP to post the data for the entity character transcoding, my page encoding is gb2312, just at the beginning is this:

　　

The $post value taken is empty, but sometimes it is good (Chinese can be problematic at times), not always.

Flipping through the PHP documentation,

The third argument charset defines character set used in conversion. The default character set is Iso-8859-1. Support for this third argument is added in PHP 4.1.0.

Will it be the default encoding for Iso-8859-1, instead of gb2312 try

Sure enough, the problem is solved.

On the problem of Htmlspecialchars entity character transcoding