HTML / PHP表单发送带有空白字段的电子邮件

I have written a contact form in Dreamweaver and embedded it in Adobe Muse. Problem is that the form sends an email OK, but with blank fields, just the headings. It's probably a problem with my code, as I'm a relative noob with HTML and even more so with PHP. The PHP script was originally downloaded from 123reg, as that is where the website is hosted. Obvs I've tweaked it to suit. I've looked at other posts with similar problems but nothing has worked.` The form seems to work ok, so maybe I can start with the PHP.I have written a contact form in Dreamweaver an