Thinkphp,onethink,thinkox Verification code does not display

When using the verification code, it starts normally and then does not show the

Online said is utf-8 coding problem, what BOM removed, converted to a non-BOM format

I've tried, it's useless.

Later I knew it was written in the place where the code was called.

Public Function Verify () {
Import (' ORG. Util.image ');
Image::buildimageverify ();
}
Just change it.
Public Function Verify () {
Import (' ORG. Util.image ');
Ob_clean ();//This is the key.
Image::buildimageverify ();
}

Ob_clean This function is used to discard the contents of the output buffer, if your site has a lot of generated picture class files, you want to access the correct, you should always clear the buffer.

Thinkphp,onethink,thinkox Verification code does not display