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![Strings • http://us2.php.net/manual/en/ref.strings.php • The various inputs and outputs need to be formatted. Various functions. string substr ( string $string , int $start [, int $length ] ) • string strstr ( string $haystack , mixed $needle [, bool $before_needle = false ] ) • And many more…](https://image.slidesharecdn.com/iitmhacku-120330014817-phpapp02/75/PHP-Basics-and-Demo-HackU-11-2048.jpg)
![Arrays • $array = array( "foo" => "bar", 42 => 24, "multi" => array( "dimensional" => array( "array" => "foo" ) ) ); • var_dump($array["foo"]); var_dump($array[42]); var_dump($array["multi"]["dimensional"]["array "]);](https://image.slidesharecdn.com/iitmhacku-120330014817-phpapp02/75/PHP-Basics-and-Demo-HackU-12-2048.jpg)
![Talking with your page • $_GET • Example.com/?query=hacku • $query = $_GET[„query‟] • $_POST • <form id=“iitm> • <input type=“text” name=“userid” /> • <submit> • </form> $id = $_POST[„userid‟]; $_COOKIES;](https://image.slidesharecdn.com/iitmhacku-120330014817-phpapp02/75/PHP-Basics-and-Demo-HackU-15-2048.jpg)
Uploaded byAnshu Prateek
PHP Basics and Demo HackU
The document provides an overview and introduction to PHP including: - PHP is a server-side scripting language used for web development. It was created by Rasmus Lerdorf in 1995. - It discusses PHP basics like syntax, variables, strings, arrays, functions, and how to interact with forms and retrieve data from web pages. - It also covers using PHP to communicate with backend databases and services to fetch and parse XML/JSON data.
PHP Basics and Demo HackU
- 1. Glory with PHP Anshu Prateek
- 2.
- 3. Agenda • The basics • Enough PHP to handle simple request • How to talk to backend data store using PHP • How to parse/generate XML/JSON in PHP
- 4. What is it..?! • What is PHP?! • RasmusLerdorf – 1995 • Compile or interpret? • CLI?
- 5. Pre-requisites LAMP/WAMP/MAMP L/W/M – Linux/Windows/Mac A – Apache M – Mysql P - PHP
- 6. About me.. Err..PHP Latest Version : 5.4.0 (released on march 01, 2012) Presently hosted on github: https://github.com/php/php-src Written in C, you can write your own modules!
- 7. The basics • Startswith <?php • <? Also accepted but recommended not to use due to xml usage • Closing ?> is not mandatory unless code structure requires closure. • Infact if possible, do not use closing ?> , helps avoid “header already sent” errors. • Double quotes allow variable substitution, single quotes don‟t. • Variables start with $
- 8. Helooo world! • <?php • php -r '$greet = • $greet = “hello”; "hello";echo "$greet • Echo $greet.‟world‟; world";'
- 9. Ways to putlong text • <?php • $variable = „the long long long copied wikipedia text”; ?> <html> … <body> <?php echo $text; ?> </body>
- 10. Or use HEREDOC • <?php • $name = „doctor who‟; • $html=<<<HTML • this is some html • And some more html • And only html! • And I can use $name „s alien powers as well! • HTML; • echo $html;
- 11. Strings • http://us2.php.net/manual/en/ref.strings.php • Thevarious inputs and outputs need to be formatted. Various functions. string substr ( string $string , int $start [, int $length ] ) • string strstr ( string $haystack , mixed $needle [, bool $before_needle = false ] ) • And many more…
- 12. Arrays • $array =array( "foo" => "bar", 42 => 24, "multi" => array( "dimensional" => array( "array" => "foo" ) ) ); • var_dump($array["foo"]); var_dump($array[42]); var_dump($array["multi"]["dimensional"]["array "]);
- 13.
- 14. Functions • Function <?php function renderList($array){ if( sizeof($array) > 0 ){ echo '<ul>'; foreach( $array as $key => $item ){ echo '<li>' . $key . ':' . $item . '</li>'; } echo '</ul>'; } } $lampstack = array( 'Operating System' => 'Linux', 'Server' => 'Apache', 'Database' => 'MySQL', 'Language' => 'PHP' ); renderList($lampstack); ?>
- 15. Talking with yourpage • $_GET • Example.com/?query=hacku • $query = $_GET[„query‟] • $_POST • <form id=“iitm> • <input type=“text” name=“userid” /> • <submit> • </form> $id = $_POST[„userid‟]; $_COOKIES;
- 16. Fetching data fromthe web.. • BOSS • Uses OAUTH
- 17. Adding it allup together.. Pictionary! 1)Getting the user provided text. 2) Remove the blacklist words. 3) Get image for the rest of the words. Show me the code..! https://github.com/anshprat/hacku
Editor's Notes
- #5 What is PHP?!PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.Code is interpreted by a Web server with a PHP processor module which generates the resulting Web page.Includes a command-line interface capability and can be used in standalone graphical applications