executable php files

It would really be nice if you would make the temporary captcha files non-executable. It should not be necessary for any php to be executable. You could replace the line in securimage_show.php from

@chmod( $img->captcha_path . $prefix . '.php', 0755 );
to
@chmod( $img->captcha_path . $prefix . '.php', 0644 );

Thanks.

https://ww.wp.xz.cn/plugins/si-contact-form/