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Upstate CSCI 450 PHP
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- 2. WHAT IS PHP? SERVERSIDE SCRIPTING LANGUAGE PHP: HYPERTEXT PREPROCESSOR CATCH THE RECURSIVE ACRONYM
- 3. • <!DOCTYPE html> <html> <head> <title>Example</title> </head> <body> <?php echo"Hi, I'm a PHP script!"; ?> </body> </html>
- 4. HOW DO WE RUN PHP? Openin a browser? Let’s try this and observe Create hello world PHP program in Atom Save on local computer as hello.php Brower File / Open file / hello.php Observe and explain
- 5. HOW DO WE RUN PHP? Weneed a server!! XAMPP to the rescue It is an installation package Installs PHP, MySQL, and Apache (web server) Refer to Appendix A of your textbook XAMPP for Linux, Windows, Mac WAMP for Windows MAMP for Mac
- 6. XAMPP X – cross-platforminstallation (windows, linux, mac) A – apache, M – MySQL, P – PHP, P – Perl Download from http://www.apachefriends.org/download.html Install on your local machine
- 7. USING PHP VIA APACHE SERVER Where toput your hello.php file? Google it and follow the example Demo on my Mac Install then run xampp
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- 16. MORE ABOUT PHP What distinguishesPHP from something like client-side JavaScript is that the code is executed on the server, generating HTML which is then sent to the client. The client would receive the results of running that script, but would not know what the underlying code was. You can even configure your web server to process all your HTML files with PHP, and then there's really no way that users can tell what you have up your sleeve. The best things in using PHP are that it is extremely simple for a newcomer, but offers many advanced features for a professional programmer.
- 17. PHP INFO EXAMPLEVIA ATOM
- 18. PHP VARIABLES • Start with$ • Letters, numbers, _ • Must start with letter or _ • $a • $a_very_long_variable_name • $_24563 • Case sensitive!! (but NOTE: keywords are NOT) • See http://localhost:8080/php_variables.ph p • See http://localhost:8080/php_variables.ht
- 19. PHP SYNTAX • Instructions endwith ; • Comments // • How do you do comments in html? • Undefined variable references generate error – see atom demo • By default variables are local in scope – limited to script or function in which defined • Use “global” to make the global in scope
- 20. SUPER GLOBALS • Somepredefined variables in PHP are "superglobals", which means that they are always accessible, regardless of scope - and you can access them from any function, class or file without having to do anything special. • The PHP superglobal variables are: • $GLOBALS • $_SERVER • $_REQUEST • $_POST • $_GET • $_FILES • $_ENV • $_COOKIE • $_SESSION
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- 22. CHAPTER 5 DEMOS Embedded condition– version 1 http://localhost:8080/examples/05/embedcondition.ph p Embedded condition – version 2 http://localhost:8080/examples/05/embedcondition_v2 .php
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- 24. CHAPTER 12 DEMOS Data types- http://localhost:8080/examples/12/testtype.php •Good idea to test data type to avoid errors Set type - http://localhost:8080/examples/12/settype.php Casting - http://localhost:8080/examples/12/casttype.php Constants - http://localhost:8080/examples/12/constant.php Arrays - http://localhost:8080/examples/12/mdarray.php
- 25. CHAPTER 12 ARRAY CONSTRUCT S & FUNCTIONS Over70!! Pages 322 – 323 https://www.php.net/manual/en/ref.array.php
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- 28. DEMO PROGRAMS • abs• source • execute