What is PHP in website terms?
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If you know what HTML is, PHP is like the same thing, but it can communicate with other files and its dynamic and server-side (so it's like JavaScript, but you can see any ugly code by viewing the source of a website and it isn't browser-selective).\nIf you don't know what HTML is, don't go there!!\nIt isn't "aka" Perl of CGI. Same idea, different language. (Calling PHP Perl is like calling a cow a cat just because they both have four legs.)
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php/jscript/css and of course, html
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Unlike a built-in function like phpinfo() a user-defined function is constructed by the programmer:\n\nfunction my_func($variable) {\n\n...code...\n\nreturn $something;\n\n}
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Your question is a bit too broad to answer fully.\n\nThat said, you can use PHP just like you would any old HTML document.\n\nPHP will already be installed by your Web hosting company. You shouldn't need to install anything.\n\nMySQL is not really a language; it's a relational database management system.\n\nGenerally speaking, if you intend to make a data-driven Web site, you need to have the data -- or, at least its structures -- in place before you can begin programming. \n\nYou should start by getting a copy of "PHP For Dummies." It really will help you.
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PHP is a scripting language.  Documents ending in .php are likely to be scripts written in that language.  First, be sure that script is not meant to do anything damaging to your computer - this can, in general, be decided based upon how reliable the source you got it from is.  The guaranteed way, of course, is to open it in a text editor but that requires you to be knowledgeable on PHP.\n\nAssuming the script is not harmful, you can install PHP on your computer and then follow simple configuration options in PHP documentation to configure PHP for the web-server you have (if you have none, you need to download that too, probably installing the web-server first is a better idea, Apache is a good web server).  Once you have it configured, you can put the PHP script in your web-server's public files folder and view it using your web-browser.\n\nOf course, all of this is a bit of a hassle; but you can find PHP information at http://www.zend.com (see developer section, downloads).  A short tutorial is at http://www.zend.com/manual/tutorial.firstpage.php
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The PHP docs are quite good and include examples:\n\nhttp://www.php.net/manual/en
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It all really depends on what you are trying to do.  If your just throwing together a web site that is only a handfull of pages then PHP is fine.   If your going to want to develop anything more complicated (online shopping, blog site, etc) then Ruby on Rails is better.
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What ever it may the final result will be in only HTML. So no need to worry about the language (ASP/PHP). You need to customize it, thats it. It is know as SEO (Search Engine Optimization)
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Well PHP and MySQL is the Best you can get for this......\n\nhttp://www.php.net/manual/en/ and Dive into the world of PHP
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definitely, PHP. (If you have to choose from these three that is - otherwise, I would have voted for perl). \nWhen you talk about web, and/or text processing, php (or perl) is THE tool for you. Nothing comes close in ease of use, and effectiveness (of both run-time and development). \nSeveral pages of a C++ or java  program are usually translated to 2-3 lines of perl or php.\n... and no, there are no "security issues",  if your server is configured properly. And if it isn't, you've got issues regardless of language. To be viable, security must be provided by the web server, not by application. \n\nYour other choices have their problems.\nJava is cumbersome, ineffective, memory hungry, unstable... to name a few. You'd be really much better off with C++ than java, especially, since you already know it. Java doesn't have any advantages over C++, except for some perceived "simplifications", that are really just functional deficiencies - such as luck of memory management options or multiple inheritance.\n\n.NET... hmmm.... hope, you are not serious. All I can say, stay away from micro-soft stuff as much as you can. It can bring nothing but sorrow.
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Name the file mypage.php instead of mypage.html. Include the php commands between tags like:\n\n<?php\n$tutssty = "Hello, how are you?";\necho $tutssty;\n?>\n\nIf you're using a free webserver, however, php is probably not enabled since the server has to parse each of the php files instead of just sending them to the viewer.
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Older versions of PHP uses <?php tag. In newer you can use both <? and <?php
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If you already know PHP and just need an extra few knowledge PHP.NET is very good. You will find your everyday solutions.\n\nBut if you are a novice http://www.w3schools.com/php/ will help better. It's a tutorial. Will find the basic stuff for PHP.\n\nGood Luck!
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^_^ weeeeell lets see here.\n\nYou have two main options. One\nis to use Javascript (Look below) and\nTwo, to use PHP.\n\n\n This is an example of javascript that will prompt the\nuser for their user name and password before they can\naccess the page. Just put this in the header of your page.\n\n<script language="Javascript" type="text/javascript">\nname = prompt("User name");\npass = prompt("User Password");\n\nif(name == "joe" && pass == "shmoe"){\nwindow.location =   "www.ProtectedpageURL.com";\n}else{\nalert("Incorrect password");\nwindow.location = "www.invalidInfoPage.com"\n}\n</script>\n\nRemember, javascript can be seen in your source so have them\nclick a link to goto the page with this code, and the redirect on\ncorrect or incorrect information will keep them from ever\nbeing able to access the page and see the source where your\naccount information will be held. \n\n\nIf you have PHP enabled on your website then email me\nat void_3e01@yahoo.com and I will be more than happy to\nmake you a complete, fool proof login script.\n\n -Void
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Web pages are mostly written in HTML.  If you want pages to accept data or do cool things like show picture slide shows you can use javascript.  Now if you want to create truely dynamic web pages that people can log in at, extract data, or search for things you'll want to use PHP.  To search you'll need a database to store info in which case you can use SQL, one such implementation is MySQL.  \n\nThese are all FREE!  There are pleanty of resources on the net to teach you.  So just search on their names and you will get plenty to keep you busy.\n\nThere are more, but this is a very popular group of software commonly known as LAMP.  Linux, Apache, MySQL, PHP. \n\nWhen you get all that working you can create super fancy stuff using FLASH from Adobe-Macromedia.  That one will cost ya.
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First, let me clarify.  Some have said Javascript or VBScript.  These are client-side programming languages, in other words, they run on the viewer's computer.  They are very limited in what they can do.\n\nPHP, Java, VB, and ASP are all server-side.  That means they create html code dynamically and then send it to the viewer's computer.  It can include Javascript and VBscript along with the HTML.\n\nFor server-side languages, I prefer PHP hands down.  Nearly all dynamic sites require using a database, and PHP has native functions built in for handling database results.  PHP was designed for web site design from the start and with PHP 5 has become truly object-oriented.  It runs faster than Java, and is cross platform (unlike ASP, which only runs on Windows OS).\n\nIt is also open-source (read free).
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Often referred to simply as peer-to-peer, or abbreviated P2P, a type of network in which each workstation has equivalent capabilities and responsibilities. This differs from client/server architectures, in which some computers are dedicated to serving the others. Peer-to-peer networks are generally simpler, but they usually do not offer the same performance under heavy loads.\n\nSelf-referentially short for PHP: Hypertext Preprocessor, an open source, server-side, HTML embedded scripting language used to create dynamic Web pages. In an HTML document, PHP script (similar syntax to that of Perl or C ) is enclosed within special PHP tags. Because PHP is embedded within tags, the author can jump between HTML and PHP (similar to ASP and Cold Fusion) instead of having to rely on heavy amounts of code to output HTML. And, because PHP is executed on the server, the client cannot view the PHP code. PHP can perform any task that any CGI program can do, but its strength lies in its compatibility with many types of databases. Also, PHP can talk across networks using IMAP, SNMP, NNTP, POP3, or HTTP. PHP was created sometime in 1994 by Rasmus Lerdorf. \n\nShort for Post Office Protocol, a protocol used to retrieve e-mail from a mail server. Most e-mail applications (sometimes called an e-mail client) use the POP protocol, although some can use the newer IMAP (Internet Message Access Protocol).