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Introduction to PHP at Winthrop

Learn the basics of PHP scripting language, how it interacts with HTML, and its features. Explore server-side and client-side scripting with PHP and JavaScript. Set up your first PHP script on Winthrop's server.

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Introduction to PHP at Winthrop

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  1. Intro to PHP at Winthrop CSCI 297 Scripting Languages Day One

  2. PHP • Server-Side scripting language • interpreted, not compiled • PHP code is embedded in HTML • PHP code is run on the server machine by the web server program when someone requests the file • PHP's output is HTML • PHP is Open Source

  3. MySQL • relational database management system • server based • allows multiple users • fast, efficient, robust

  4. JavaScript • client-side programming language • embedded in HTML files • instructs browser to react to particular events, set attributes of HTML elements, etc. • e.g. popup a new window • e.g. check a cookie file • e.g. only submit a form that contains valid entries

  5. Hello World - your PHP code hello.php <html> <body> <P> <center> <?php function longdate ($timestamp) { return date("l F jS Y", $timestamp); } echo "Hello World<P>Today is "; echo longdate(time()); ?> </body> On Deltona this file must end with .php not .html

  6. Hello World - what the user sees

  7. Winthrop's Configuration • Winthrop's PHP server for students is deltona.birdnest.org • Your homepage: • http://deltona.birdnest.org/~acc.yourid/ • The deltonaweb server looks for all web files in your public_html directory. • You can edit your files from any linux box on the Winthrop network. • Your homepage is index.html, not default.htm.

  8. Steps to create your first PHP script • Go to your root directory cd • Create a public_html directory, if necessary mkdirpublic_html • Make your root directory and the html directory readable by the web server process (it is run by "nobody", not you). chmoda+x . chmoda+xpublic_html • Move to the html directory and create your script file cd public_html vi hello.php chmoda+rhello.php

  9. A Better Example simpleform.html <html> <head> <title>Test Program: Send Form to PHP script</title> </head> <Body> <form method='post' action='simpleformproc.php'> Enter your name:<br> <input type='text' name='yourname'> <P> <input type='submit'> </form> </Body> </html>

  10. A Better Example simpleformproc.php <html> <head> <title>The processor of simpleform.html</title> </head> <body> <center> Hello &nbsp; <?php // get name from form $name = $_POST['yourname']; // did they really enter something? if (strlen($name) == 0) echo "whoever you are."; else echo $name; ?> </body> </html>

  11. Your First Homework • Type in my hello.php script and get it to work. • Add comments • your name • assignment number • Follow the instructions for emailing your work. • use the correct subject line

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