71.46 2.24 352 4 © Tolearn how to set up environment of PHP. © To learn how to declare and assign values to variable of PHP. @ To study PHP arithmetic using different types of operators. © To study Arrays and different types of Arrays like indexed array, associative array ang multidimensional array of PHP. PHP is recursive acronym “Hypertext Pre-processor" it is a widely used open source general purpose scripting language that is for developing web applications and its code can be easily embedded into HTML. PHP is so popular because it's very simple to learn, code and deploy on server, hence it has been the popular language amongst the developers. Like any other scripting language it allows developers to build logic into the creation of web page'content and handle data returned from a web browser, PHP also contains a number of extensions that make it easy to interact with databases, extracting data to be displayed on a web page and storing information entered by a web site visitor back into the database. PHP consists of a scripting language and an interpreter, Like other scripting languages, PHP enables web developers to define the behavior and logic they need in'a web page. Features of PHP Somé unique features of PHP are as follows: Performance: Scripts written in PHP executes faster than other scripting lan Are like JSP, ASP.NET and Perl. PHP designed to improve performance through optimized memory, also third party applications are available which improves the response time. i aup (9BA (CA): Sem.) Bases e + Portability: PHP is available for Windows, Uni: , Unix, MAC OS and are portable between platforms. Portability means ieee execute on Unix without any changes. Program written on windows can +» Ease of hee It is extremely sophisticated programming language, its syntax is very clear and consistent. Thats why programmers can easily 0 i read is favored for web based applications. ‘ berate + Open source: PHP is open source project it means this language is developed by worldwide team of volunteers who makes it source code freely available. So there is no licensing fees required. This is an important factor for reducing software development cost. Also it makes robust because any developer can suggest changes in the source code of language and it can be added as per guidelines. + Third party application support: PHP supports for different wide range of databases, like MySQL, Postgres SQL, oracle, Microsoft Server. It supports more than fifteen databases. PHP also supports XML to read and write the documents. « Widely used: PHP is used on more than millions of websites from pérsonal home pages to giants like facebook, wikipidea, tumbir, yahoo etc. Also, there are so many peoples who are using PHP for web development. | Communication Between Apache Server and Web Browser * Now we will see how communication takes place between web browser and web server. + When you are accessing a page using browser such as safari or firefox, it cause a little conversation to. happen over the internet between your computer and another computer. +” When PHP is involved the server does more work for its half over the conversation. 1 www.example.com/my.php/test.phpPHP Basics PHP (BBA (CA): Sem-I0) 1 22 3. 4 5. 6. ‘When you request a PHP page on browser. Browser sends message over the internet to the computer asking for www.example.com/my.php/test.php. Apache server running wwwi.example.com gets this message and ask for PHP engine. The PHP engine reads the test.php file from the disk drive. ‘The PHP engine runs the commands and access the data with database such as mysql. 1m output and sends back to apache HTTP server in turn PHP engine takes the progra apache server sends back the output toyour browser. e XAMPP, LAMPP or we can download We can install all in one packages for PHP and install PHP manually also. Firstly we will see how we install XAMPP, KAMPP s MariaDB, PHP and Perl). o Apache: It is open source web server. worldwide for delivery of web content. Th a free software by the Apache Software Foundation. MySQL/MariaDB: In MySQL, XAMPP contains one of th database management systems in the world. In combination with the web server ‘Apache and the scripting language PHP, MySQL offers data storage for web services. Current XAMPP versions have replaced MySQL with MariaDB. PHP; It is server-side programming language. PHP enables users to create dynamic websites or applications. PHP can be installed on all platforms and se database systems. juagé Perl is used in Like PHP, Perl also enables users to ands for cross platform (Apache, ‘Apache is the most widely used server server application is made available as e most popular relational supports a number of dive Perl; The scripting lang development, and network programming. program dynamic web applications. We can install XAMPP from wow.apach' jon, currently itis 7.4.7. run .exe file, yo system administration, web efriends.org site where you have to download its recent vers! ‘After downloading the file, ree to everything. If error messages are make sure that everything un When successfully installed it will stop the services and you can configure them 13 xa have to just click on next and 2g \d open the PHP.ini file, and not displayed, go to cxxampp/PHP an der error handling and logging. show a dashboard through which e changing the ports etc. you can start,/ PHP (BBA (CA) : Sern-tM) Sve Apache SRG See] faa | EY [Ehsve —yset RRUEITAGR|[ stn] [adi | | eee sve riezita stat] [Ani] | hep] | Mereury Stat] [Ramin = i 7 Hay, 2007) [windows 6.0 Build 001 Plaeform 2 Service Pack t Fig. 1.2 Open your browser and enter the URL http://localhost, it will open up the XAMPP welcome page. To ensure that the Apache and MySQL servers have been installed on system, restart your operating system, run the browser, and enter the http://localhost URL again. You should see the below screen on browser. ~ EBXAMPP for Windows oeManually installing PHP on windows: Development environment on Linux a Most oftenly you will be able to redirect to home page of XAMPP if yoy can't ey Sey (CA): Sem-I0) you have to stop services which are running on port 80 or you can change tat tt the apache to another port number. peta Most commonly service is installed on http port 80 or 8080, You can save your programs in htdocs folder located in c:/xampp from yh, willbe fetched on localhost. Ee they PHP 55 and higher version requires at least windows 8, 2010 or higher very, windows with 32 bit or 64 bit, You have to check necessary hardware configure also before installing PHP. BUrations PHP requires Visual C Runtime (CRT) . Mariy applications requires it soit mp, installed. ay be. Installing PHP on a Windows 10 machine is not at all difficult. Fits of ay understand the steps involved. lets 1. First, we will download the latest PHP package from the PHP website, 2. Once we have the zip file we will create a PHP7 folder in the C drive and: extract th contents of the zip file in this folder. ie . Configure php.ini file : you need to make some changes in this file, Define extension directory: extension_dir="c:\php/ext" . Change the path environment variable, . Now open Environment Variables (MyComputer -> System Properties Environment Variables), under system variables, select Path and click Edit, in the Variable value, go to the end of the list and put a semicolon, then aéd C:\php;C:\php\ext assuming C:\php is the location of your PHP installation, aya One of the most common server configuration is LAMP stack (Linux, Apache, MysQh, PHP). We will be using this set up and execute our programs on it. As this is the most commonly used and easy to install set up of PHP, Also these are all in one packages For Linux we will try to install, apache, MySQL separately and try not to install thin party applications. ‘You can still install AAMPP if you would prefer to use that instead, But remembe 8 is a development environment and you should not try use/configure these Y party applications to run asa live server, Fi i irstly we will check system updates for Linux, sudo apt-get update Sudo apt-get upgrade Sudo apt-get dist- upgrade Ity