Can anyone explain me this php script.

php script - php sample code
Philippines
December 31, 2012 4:50pm CST
I'm studying web development. I got some codes online but I have something that I don't understand. Can anyone help me please. Thanks a lot in advance!! Here's the script:
1 person likes this
2 responses
dollar3235
@dollar3235 (2062)
• India
1 Jan 13
Php code details - incorrect php code
I've attached my response as a picture with this comment, hope it helps.
dollar3235
@dollar3235 (2062)
• India
1 Jan 13
Php code details - Php code block
For some reason the text is not visible in the snapshot which I've uploaded, I'm trying again, let's hope this time the text will be visible.
angelbelle578
@angelbelle578 (1635)
• Philippines
6 Jan 13
Thanks for the respond! actually the code is working but I don't understand why they put "." before and after the variable.
bestboy19
@bestboy19 (5478)
• United States
1 Jan 13
I would love to be able to help you, but I know nothing about web development.