What is PHP?

PHP is an embedded web-based scripting language similar to ASP, though with a syntax that is closer to Perl, C and (to some extent) Java than VBScript, which is the commonly used language in ASP.

Embedded means that PHP code is put inside normal HTML to provide dynamic content. The advantages of this include:

• Graphic designers can design the look and feel of a site without having to know how to code. Then coders can add the dynamic stuff without having to know much about good HTML design. Changing the look & feel of a site can be done without much change in the code.
• Rapid application development -- the HTML of a site can be thrown out quickly to build a rapid prototype, and then the code can be added to this framework.
• Placing PHP code on an HTML form allows you to use the same page for filling out the form and for correcting validation errors (like a missing phone number entry), so there's no need to look after two separate pages.
  

PHP's similarity to Perl makes it easy to learn; the differences in the syntax are mostly to tidy it up. Those familiar with Perl (but not too rabidly fond of it) will find PHP refreshingly tidy in comparison, while the more avid Perl fans will find that they can do almost anything in PHP that Perl could do - in fact, in some places it's a lot easier. String manipulation in PHP is a lot more simple than in Perl.

WOW, I didn't know nothing about PHP and now I do.

php is the ultimate divine language and it is above all comparizons

Any body can use PHP. It is very nice to use.

PHP is the most common used language by webmasters. I really liked.

PHP is really easy to learn and understand once you take awhile and study it.

Very true. This place encourage me to learn PHP and that is very worthy..

once you got the basics it will get really easy to learn
with every language i learn it goas fast and easy once i slowly learned the basics

Please, is it possible for you to post at least two lines if you like php so much?
Anyway, it's true that it is a very powerful language and is something that any webmaster should at least have a clue about but I won't go as far as saying:

There are also other programming languages that are useful.
If you truly want to be a good webmaster and cover all the domains you should also know html, since it is still extremely used all over the net, java, because java scripts are all over the place and you need them in order to realize some more complex web-tools and it wouldn't hurt if you'd knew some action script so you could be able to make some really nice things in Flash for your site.

I would certainly like to learn more PHP , I only have what friends have sent to me for my site like a contact form in php.
but I want to have a sign in members list so they can manualy update there details.and a message or blog imbeded within my sites. so people can discuss there issues and get answers without having to have a large forum.

The better option is to use some scripts which helps you to facilitate your needs. A site designer needs more skills on CSS and HTML rather than PHP or other scripting language.