PHP

What Is PHP? So, what is this whole PHP business all about?

PHP is a program that gets installed on top of your web server software. It works with versions of Apache (Tutorial:Apache for Beginners), Microsoft IIS and other server software packages.

You use PHP by inserting PHP code inside the HTML that makes up your website. When a client (anybody on the web) visits a web page that contains this code, your server executes it. That’s why you need to install your own server in order to test PHP locally — the server is the brain here, not your browser. Users don’t need any special plug-ins or anything to see your PHP in action — it gets to the end user as regular old-fashioned HTML.

PHP is a scripting language, like HTML. That means that code does not need to be compiled before it gets used — it gets processed on the fly as necessary.

Before we dig in, you should know about a site called PHP.net. PHP is an open-source language, and PHP.net is its control center, with extensive reference material about the language and tips sent in by users across the globe. PHP.net has exceptional, deep information about the language, but it can be a little cryptic for the newcomer. We’ll look more closely at how to use PHP.net at the end of this tutorial.

So, what kinds of things can PHP do? Welllll … it can:

take info from web-based forms and use it in a million ways (store it in a database, create conditional pages depending on what the forms said, set cookies for later, send e-mail, write your mom on her birthday);

authenticate and track users;

run threaded discussions on your site;

serve different pages to people using different browsers or devices;

publish an entire website using just a single layout template (server-side includes-style);

serve XML pages. But before we can get to the specific uses of PHP, we need to start with a quick preview of the building blocks of PHP, beginning with a sample script. This example script is titled “chickenman.php.” When called by a web browser, it would simply read, “I am the CHICKEN MAN!”

The ?php and ?¢ tags start and end a PHP script, and your meat goes in the middle. Got that? Good! Now let’s walk through the basic rules you need to know to before you can write your first PHP script.

What Is PHP?What is PHP and how to use it?

PHP was at first created as a simple scripting platform called "Personal Home Page". Nowadays PHP is an alternative of the Microsoft's Active Server Pages (ASP) technology. PHP is an open source server-side language which is used for creating dynamic web pages. It can be embedded into HTML.

What Is PHP?What is PHP and SQL used for?

PHP is the most popular scripting language for web development. It is free, open source and server-side (the code is executed on the server). MySQL is a Relational Database Management System (RDBMS) that uses Structured Query Language (SQL). It is also free and open source.

What Is PHP?What is PHP as a drug?

α-Pyrrolidinohexiophenone (α-PHP, alpha-PHP, α-Pyrrolidinohexanophenone, PV-7) is a synthetic stimulant drug of the cathinone class developed in the 1960s which has been reported as a novel designer drug.

Why PHP is used?

PHP is a general-purpose scripting language that is especially suited to server-side web development, in which case PHP generally runs on a web server. Any PHP code in a requested file is executed by the PHP runtime, usually to create dynamic web page content or dynamic images used on websites or elsewhere.

What is the difference between mysql and SQL?

MySQL is one of several database systems, or RDMS (Relational Database Management System). MySQL is one of several RDMS's, others of which are Oracle, Informix, Postgres, and MSQL. ... Basically, the difference between SQL and MySQL is the same as the difference between Spanish and Mexicans. Spanish is a language

What is Mysqli PHP?

The MySQLi Extension (MySQL Improved) is a relational database driver used in the PHP scripting language to provide an interface with MySQL databases. There are three main API options when considering connecting to a MySQL database server: PHP's MySQL Extension. PHP's MySQLi Extension. PHP Data Objects (PDO)

What is PHP can do?

PHP is mainly focused on server-side scripting, so you can do anything any other CGI program can do, such as collect form data, generate dynamic page content, or send and receive cookies. ... You can access the PHP program output with a web browser, viewing the PHP page through the server.

What is the PHP?

PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.

Is PHP programming language?

It seems, according to this, that PHP is a programming language. ... PHP: Hypertext Preprocessor is a widely used, general-purpose scripting language that was originally designed for web development to produce dynamic web pages.

What is a PHP syntax?

The PHP syntax and semantics are the format (syntax) and the related meanings (semantics) of the text and symbols in the PHP programming language. They form a set of rules that define how a PHP program can be written and interpreted.

*What is PHP HTML?

Self-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.

What is a PHP variable?

Rules for PHP variables: A variable starts with the $ sign, followed by the name of the variable. A variable name must start with a letter or the underscore character. A variable name cannot start with a number. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )

What is PHP and how to use it?

HP was at first created as a simple scripting platform called "Personal Home Page". Nowadays PHP is an alternative of the Microsoft's Active Server Pages (ASP) technology. PHP is an open source server-side language which is used for creating dynamic web pages. It can be embedded into HTML.

How does PHP work?

The PHP software works with the web server, which is the software that delivers web pages to the world. ... This process is essentially the same when PHP is installed. You request a file, the web server happens to be running PHP, and it sends HTML back to the browser, thanks to the programming in PHP.

How does HTML work on the Internet?

The text is then saved as a html file, and viewed through a browser, like Internet Explorer or Netscape Navigator. This browser reads the file and translates the text into a visible form, hopefully rendering the page as the author had intended. Writing your own HTML entails using tags correctly to create your vision.

What is CSS and why is it important?

The Importance of CSS in Web Development. Cascading Style Sheets, commonly known as CSS, is an integral part of the modern web development process. It is a highly effective HTML tool that provides easy control over layout and presentation of website pages by separating content from design.