PHP
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The document provides an introduction to PHP, covering topics such as: - PHP code syntax and rules for variables, quotes, comments, and case sensitivity - Common PHP structures like loops, strings, constants, and conditional statements - Functions, arrays, superglobals, and form validation - JSON data transfer between PHP and jQuery - Responding to GET, POST, and AJAX requests - Links to PHP documentation and learning resources are also provided.
![PHP Form Validations
➢ Check for $_SERVER["REQUEST_METHOD"]
➢ Check if each of the required fields are filled up
➢ empty()
➢ isset()
➢ trim()
➢ stripslashes()
www.PracticalCoding.inwww.PracticalCoding.in](https://image.slidesharecdn.com/qu2gg8ushmclpbtxmugi-signature-c5b8be8bbd4c0e8d9f2cb7d991f196e03760c95941be5560218d2f8a9ae7a7a9-poli-151003143005-lva1-app6892/85/PHP-14-320.jpg)
![Handling JSON data transfer between PHP and jQuery
{"employees":[
{"firstName":"Rahul", "lastName":"Kejri"},
{"firstName":"Smriti", "lastName":"Gandhi"},
{"firstName":"Kamal", "lastName":"Advani"}
]}
www.PracticalCoding.inwww.PracticalCoding.in](https://image.slidesharecdn.com/qu2gg8ushmclpbtxmugi-signature-c5b8be8bbd4c0e8d9f2cb7d991f196e03760c95941be5560218d2f8a9ae7a7a9-poli-151003143005-lva1-app6892/85/PHP-17-320.jpg)
PHP
- 2. A bit about PHP ➢Originally stood for Personal Home Pages ➢Acronym changed to Hypertext Preprocessor www.PracticalCoding.inwww.PracticalCoding.in
- 3. Introduction to PHP rules ➢ PHP code is always enclosed by <?php…?> ➢ Every PHP statement must terminate with a semicolon(;) ➢ If there is PHP code on your page, file extension has to be .php ➢ PHP Variables must begin with a $ symbol ➢ Spaces and special characters other than _ and $ are not allowed in a variable name ➢ Use ‘echo’ or ‘print’ commands to output data www.PracticalCoding.inwww.PracticalCoding.in
- 4. ➢ Single Quotes ➢ Double Quotes ➢ Newline ➢ Commenting (single line and multiline) ➢ Case (in)sensitive ➢ Variables ➢ Local and Global scope of variables www.PracticalCoding.inwww.PracticalCoding.in
- 5. Loops ➢ while ➢ do...while ➢ for ➢ foreach ($array as $value) ➢ foreach (array_expression as $key => $value) www.PracticalCoding.inwww.PracticalCoding.in
- 6. Strings in PHP ➢ strlen(‘Any data’); ➢ str_word_count(“Counting words”); ➢ strrev(“Gadag”); ➢ Complete list of functions: http://php.net/manual/en/ref.strings.php www.PracticalCoding.inwww.PracticalCoding.in
- 7. PHP CONSTANTS ➢Identifier for a value ➢define(name, value, case-insensitive) ➢Global ➢$ not required while using www.PracticalCoding.inwww.PracticalCoding.in
- 8. PHP Conditional Statements 1. if statement 2. if...else statement 3. if...elseif....else statement 4. switch statement www.PracticalCoding.inwww.PracticalCoding.in
- 9. User defined functions in PHP function functionName($arg1,$arg2=56) { code to be executed; return $someVariable; } www.PracticalCoding.inwww.PracticalCoding.in
- 10. PHP Arrays ➢ PHP Indexed array ➢ Loop through an Indexed Array (Exercise) ------------------------------------------------------------------------------------ - ➢ PHP Associative arrays ➢ Loop through an Associative Array (Exercise) www.PracticalCoding.inwww.PracticalCoding.in
- 11. PHP Array Sorting ➢ sort() ➢ rsort() ➢ asort() ➢ ksort() ➢ arsort() ➢ krsort() www.PracticalCoding.inwww.PracticalCoding.in
- 12. PHP Superglobals ➢ $GLOBALS ➢ $_SERVER ➢ $_REQUEST ➢ $_POST ➢ $_GET ➢ $_FILES ➢ $_ENV ➢ $_COOKIE ➢ $_SESSION www.PracticalCoding.inwww.PracticalCoding.in
- 13. Configure xdebug Create a quick form submit and look at $_POST www.PracticalCoding.inwww.PracticalCoding.in
- 14. PHP Form Validations ➢ Check for $_SERVER["REQUEST_METHOD"] ➢ Check if each of the required fields are filled up ➢ empty() ➢ isset() ➢ trim() ➢ stripslashes() www.PracticalCoding.inwww.PracticalCoding.in
- 16. An exercise on simple validations ➢ Check if the first name and last name have valid characters ( no numbers/symbols ) ➢ Check if the given email ID is a valid email ID www.PracticalCoding.inwww.PracticalCoding.in
- 17. Handling JSON data transfer between PHP and jQuery {"employees":[ {"firstName":"Rahul", "lastName":"Kejri"}, {"firstName":"Smriti", "lastName":"Gandhi"}, {"firstName":"Kamal", "lastName":"Advani"} ]} www.PracticalCoding.inwww.PracticalCoding.in
- 18. Responding to .get(), $.post() and $.ajax() www.PracticalCoding.inwww.PracticalCoding.in