What is a PHP script? - php script example [ All Usefully Tools ]

 What square measures the Uses of PHP?

The great factor concerning PHP is that it's implausibly basic for a beginner whereas still together with a wealth of subtle options for a seasoned technologist. Don’t be intimidated by the long list of PHP’s capabilities. you ought to hop right in and start writing basic scripts in a very matter of hours.

• PHP executes system operations, like making, opening, reading, writing, and shutting files on         a system.
• PHP will manage formats, which suggests it will collect knowledge from databases, save                knowledge to a file, send knowledge by email, and come back knowledge to the user.
• PHP permits you to feature, erase, and alter things in your info.
• PHP’s core space is server-side scripting. If you would like to practice reception as an                    associate degree amateur, this can be the thanks to going.
• Scripting from the command is good for old women or Task hardware scripts. It’s conjointly         helpful for basic text pieces of writing.
• To communicate with each back-end/info server, like MySQL.
• You can use PHP to seek out today’s date and then produce a monthly calendar.
• PHP is often wont to generate markup language code for net browsers.
• If you've got banner ads on your website, PHP will be wont to rotate them indiscriminately.
• You could use PHP to limit a user’s access to one online page.
• You will build a login page for your user victimization PHP.
• Connects an internet browser to info.

So these square measure the uses of PHP, But, you didn’t understand why we tend to use PHP Language, let Pine Tree State justify you in the following:

Why do we tend to use PHP Language?

You’ve already detected several completely different programming languages, and you’re in all probability curious why we decide on PHP as our poison for net programming. as a result, PHP has glorious online documentation and a solid operating structure. As a result, the language is comparatively easy to be told and includes a massive online community. There square measure a superfluity of forums and guides on completely different PHP approaches and problems, therefore you ought to haven't any bother finding help if you wish it. Here square measures some basic purpose.

• It operates on a spread of platforms, together with Windows, Linux, and Unix.
• It works for a spread of databases, together with MySQL, Oracle, and PostgreSQL.
• PHP is an associate degree open supply artificial language that's offered to anyone for free of         charge.
• When against different languages like JSP, ASP, and others, the training curve is                            comparatively short.
• This language is easy to select and use, and it performs well on the server aspect.
• It’s ideal for net creation as a result it will be inserted right into the markup language code.
• On completely different operative systems, it's typically employed in conjunction with                    Apache (the application server). It’s conjointly compatible with Microsoft’s IIS on Windows.
• PHP will be wont to create interactive websites still.
• Another advantage of PHP is that it's a server-side scripting language, which suggests simply         solely got to install it on the server which shopper computers requiring services from the                server don't need PHP; just employing a browser is adequate.

How PHP Scripts Work

Before you find out how to put in writing PHP scripts, it's necessary to understand specifically how development victimization PHP works. to know this, you want to initially perceive the interaction between a shopper (for instance, your net browser) and also the net server. once a shopper requests a document from the net server, usually, the net server retrieves the document (if it exists, of course) and sends it to the shopper. In most cases, this document is an associate degree markup language file, image, and so on, that the shopper then processes and displays in your browser window. In distinction, rather than causing the document on to the shopper, the associate degree intermediate step known as preprocessing is taken for PHP scripts. throughout this step, the PHP interpreter processes the PHP script requested, executes any code at intervals of the script, and sends the output back to the net server to be sent to the shopper. even though the first purpose of the PHP script normally is to come up with markup language content, throughout a script's execution everything from accessing databases to causing emails could manifest itself.

One inherent distinction between this artificial language and different development platforms is that each code is dead on the server. this suggests that no special programs, plug-ins, or libraries square measure necessary for shoppers to execute the scripts. As long as the shopper will properly request documents from an internet server, it will benefit from the PHP scripting language thereon server.

The Language

PHP is an associate degree in the understood language. this suggests that you just can write code statements (lines of code) and once a page is requested, the PHP interpreter can load your PHP code, dissect it then execute it. This differs from different languages, like Java or C#, wherever the ASCII text file is compiled then dead. this can be helpful for net development within the indisputable fact that you are doing not ought to re-compile your ASCII text file for trivial code changes and also the changes have immediate results on all resultant requests.

PHP is written as customary text files with the .php extension. PHP files square measure typically saved within a folder in a very net server's public directory (or an internet root directory). On most systems, this may either be named public or public.html. as an example, if a file was saved as index.php in a very net root directory, a user might access it by typewriting http://www.example.org or http://www.example.org/index.php.

What is a PHP File?

• PHP code is dead on the server, and also the results came back to the browser as plain markup language
• PHP files have extension ".php"

What will PHP Do?
• PHP will generate the dynamic page content
• PHP will produce, open, read, write, delete, and shut files on the server
• PHP will collect kind information
• PHP will send and receive cookies
• PHP will add, delete, modify information in your information
• PHP may be accustomed to management user-access
• PHP will code information
With PHP you're not restricted to output markup language. you'll output pictures, PDF files, and even Flash movies. you'll conjointly output any text, like XHTML and XML.

Where to use PHP code?

You can use PHP to make dynamic sites, collect kind information, and send or receive cookies.

Server-Side Scripting

Server aspect scripting is the 1st purpose of PHP. All you wish to begin engaged on a desktop laptop with PHP could be a PHP program, an internet online server (such as Apache), and a web browser like Google Chrome.

Command Line Scripting

If you would like to use PHP programming on a UNIX system or task computer hardware on Windows, then you don’t really want an internet server, but solely a PHP program. this is often known as “command-line scripting”.

Desktop Applications

Although, PHP isn't an acceptable language for the development of desktop applications, however, it supports some advanced options like PHP-GTK which is largely associated with extensions of PHP. PHP-GTK provides object-oriented program.

PHP programming allows you to decide on not solely the software package of your alternative however conjointly permits you to possess selections to use an internet server that you just area unit conversant in. It conjointly allows beginners and professionals to write down scripts in their own ways in which because it permits procedural similarly to object-oriented programming.

PHP not solely allows you to output markup language however conjointly allows you to embrace pictures, PDFs, videos, and sounds. PHP will auto-generate XHTML and XML files. It conjointly supports WDDX advanced information exchange.