Phphacku iitd
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
1,683
On Slideshare
1,683
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
6
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Sorabh Jain saurabhj@yahoo-inc.com IIT-Delhi 9-Aug-2013 Hacks With PHP, MySQL & JS
  • 2. Why PHP ? It is a server side scripting language which allows you to :- • Dynamically edit, change or add any content to a Web page • Respond to user queries or data submitted from HTML forms • Access any data or databases and return the result to a browser • Customize a Web page to make it more useful for individual users • Provide security since your server code cannot be viewed from a browser • Does not require any special tools. Create a file with .php extension and your done.
  • 3. Why JavaScript ? • Client side scripting language which makes your browser more interactive. • No need to go back to server for form validation • JavaScript inserted into HTML pages, can be executed by all modern web browsers. • It makes you static HTML page dynamic which was not easy with CSS.
  • 4. Why MySQL ? • Open source data storage RDBMS which is easy to install and use with any operating system. • Lot of support and libraries available in scripting languages like php.
  • 5. What we need to learn? • Enough PHP to handle simple request • How to talk to mysql data store using PHP • How to parse/generate XML/JSON in PHP • Enough JavaScript to make browser interactive
  • 6. How it works?
  • 7. Getting Started • You need a local server with PHP enabled. • XAMPP for windows • MAMP for Mac OSx • Linux has it by default
  • 8. <?php $school=”IIT-Delhi"; echo "Hello, $school hackers"; ?> Create a file hello.php into webserver directory and call it like this http://localhost:80/hello.php Getting Started
  • 9. Basic Syntax • PHP blocks start with <?php and end with ?> - • Every line of PHP has to end with a semicolon ";” • Variables in PHP start with a $ • You print out content to the document in PHP with the echo command. • $school is variable and it can be printed out • You can jump in and out of PHP anywhere in the document. So if you intersperse PHP with HTML blocks, that is totally fine. For example:
  • 10. <?php $origin = 'Outer Space'; $planet = 'Earth'; $plan = 9; $sceneryType = "awful"; ?> <h1>Synopsis</h1><p>It was a peaceful time on planet <?php echo $planet;?> and people in the <?php echo $sceneryType;?> scenery were unaware of the diabolic plan <?php echo $plan;?> from <?php echo $origin;?> that will take their senses to the edge of what can be endured.</p> Mix Match • You can mix and match HTML and PHP demo1.php
  • 11. Displaying more complex data • You can define arrays in PHP using the array() method $lampstack = array('Linux','Apache','MySQL','PHP'); • If you simply want to display a complex datatype like this in PHP for debugging you can use the print_r() command $lampstack = array('Linux','Apache','MySQL','PHP'); print_r($lampstack); demo2.php
  • 12. Arrays • Accessing arrays using index <ul> <?php $lampstack = array('Linux','Apache','MySQL','PHP'); echo '<li>Operating System:'.$lampstack[0] . '</li>'; echo '<li>Server:' . $lampstack[1] . '</li>'; echo '<li>Database:' . $lampstack[2] . '</li>'; echo '<li>Language:' . $lampstack[3] . '</li>'; ?> </ul> demo3.php
  • 13. Arrays • Iterating through arrays <ul> <?php $lampstack = array(’MacOs','Apache','MySQL','PHP'); $labels = array('Operating System','Server','Database','Language'); $length = sizeof($lampstack); for( $i = 0;$i < $length;$i++ ){ echo '<li>' . $labels[$i] . ':' . $lampstack[$i] . '</li>'; } ?> </ul> sizeof($array) - this will return the size of the array demo4.php
  • 14. Associative Arrays • PHP has associative arrays with string keys <ul> <?php $lampstack = array( 'Operating System' => 'Linux', 'Server' => 'Apache', 'Database' => 'MySQL', 'Language' => 'PHP' ); $length = sizeof($lampstack); $keys = array_keys($lampstack); for( $i = 0;$i < $length;$i++ ){ echo '<li>' . $keys[$i] . ':' . $lampstack[$keys[$i]] . '</li>'; } ?> </ul> demo5.php
  • 15. Functions <?php function renderList($array){ if( sizeof($array) > 0 ){ echo '<ul>'; foreach( $array as $key => $item ){ echo '<li>' . $key . ':' . $item . '</li>'; } echo '</ul>'; } } $lampstack = array( 'Operating System' => ’Windows', 'Server' => 'Apache', 'Database' => 'MySQL', 'Language' => 'PHP' ); renderList($lampstack); ?> demo6.php
  • 16. Interacting with the web - URL parameters <?php $name = 'Tom'; // if there is no language defined, switch to English if( !isset($_GET['language']) ){ $welcome = 'Oh, hello there, '; } if( $_GET['language'] == 'hindi' ){ $welcome = 'Namastae, '; } switch($_GET['font']){ case 'small': $size = 80; break; case 'medium': $size = 100; break; case 'large': $size = 120; break; default: $size = 100; break; } echo '<style>body{font-size:' . $size . '%;}</style>'; echo '<h1>'.$welcome.$name.'</h1>'; ?> demo7.php
  • 17. Loading content from the web <?php // define the URL to load $url = 'http://cricket.yahoo.com/player-profile/Sachin- Tendulkar_2962'; // start cURL $ch = curl_init(); // tell cURL what the URL is curl_setopt($ch, CURLOPT_URL, $url); // tell cURL that you want the data back from that URL curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // run cURL $output = curl_exec($ch); // end the cURL call (this also cleans up memory so it is // important) curl_close($ch); // display the output echo $output; ?> demo8.php
  • 18. Connecting to MySQL • Simple example to fetch data from DB
  • 19. Twitter Api Demo • Creating a sample app on twitter developer network • Giving proper permissions to app and specifying which url we want to hit from twitter app. • Writing code to make o-auth call to twitter • Making twitter api calls after successful o-auth validation.
  • 20. Sample Codes PHP sample code:- https://github.com/sorabhjain/phpsamplecode Twitter Api demo code:- https://github.com/sorabhjain/twitterapi Twitter api docs:- https://dev.twitter.com/docs/api/1.1
  • 21. Further Reference http://www.php.net/ http://developer.yahoo.com http://isithackday.com/hackday-toolbox/ http://phpforhacks/index.html http://hackyourworld.org/