Introduction to PHP 7

A short presentation highlighting the new and removed features of PHP 7

Transcript

1. Introduction to PHP 7 PAUL MCBRIDE @pmcbride446
2. OVERVIEW ̣ History of PHP ̣ Whats new in PHP 7 ̣ Removed and deprecated features ̣ References ̣ Questions
3. History of PHP Jun 1995 Released by Rasmus Lerdorf Jun 1998 PHP 3 Released May 2000 PHP 4 Released
4. Jul 2004 PHP 5 Released 2005 Work starts on PHP 6 May 2003 Wordpress 1.0
5. Dec 2015 PHP 7 Released Mar 2010 PHP 6 is abandoned Feb 2016 Paul gives a great talk on PHP 7
6. New Features
7. SCALAR TYPE DECLARATIONS <?php
 
 function greeting(string $name)
 {
 return "Hello, {$name}";
 } ̣ String ̣ Integer ̣ Float ̣ Boolean New types
8. RETURN TYPES <?php
 
 declare(strict_types=1);
 
 function sum($a, $b): int
 {
 return $a + $b;
 }
 
 echo sum(1, 5.5);
9. NULL COALESCING OPERATOR <?php
 
 // Pre PHP 7
 $username = isset($_GET['user']) ? $_GET['user'] : 'nobody'; <?php $username = $_GET['user'] ?? 'nobody'; <?php $username = $_GET['user'] ?? $_POST['user'] ?? 'nobody';
11. SPACESHIP OPERATOR <?php
 
 // Integers
 echo 1 <=> 1; // 0
 echo 1 <=> 2; // -1
 echo 2 <=> 1; // 1
 
 // Floats
 echo 1.5 <=> 1.5; // 0
 echo 1.5 <=> 2.5; // -1
 echo 2.5 <=> 1.5; // 1
 
 // Strings
 echo "a" <=> "a"; // 0
 echo "a" <=> "b"; // -1
 echo "b" <=> "a"; // 1
12. CONSTANT ARRAYS <?php
 
 define('ANIMALS', [
 'dog',
 'cat',
 'bird'
 ]);
 
 echo ANIMALS[1]; // outputs "cat" Arrays can now now be defined using define()
13. ANONYMOUS CLASSES <?php
 
 new class {
 public function log(string $message)
 {
 echo $message;
 }
 };
14. GROUP USE DECLARATIONS <?php
 
 // Pre PHP 7 code
 use some\namespace\ClassA;
 use some\namespace\ClassB;
 use some\namespace\ClassC as C; <?php
 
 // PHP 7+ code
 use some\namespace\{ClassA, ClassB, ClassC as C};
15. PERFORMANCE
16. PERFORMANCE
17. OTHER FEATURES ̣ Better unicode support ̣ Integer division with intdiv() ̣ Improved error handling ̣ Session_start() can now take an options array ̣ unserialize() filter ̣ CSPRNG Functions
18. DEPRECATED/REMOVED FEATURES
19. REMOVED FEATURES ereg_* ̣ ASP-style tags ̣ PHP script tags ̣ All functions ̣ The mysql extension (and the functions) <% <%= %> <script language=”php”> mysql_*
20. DEPRECATED FEATURES ̣ PHP 4 style constructors ̣ Static calls to non-static methods ̣ Salt option for password_hash()
21. REFERENCES ̣ http://php.net ̣ https://www.digitalocean.com/company/blog/ getting-ready-for-php-7/
22. QUESTIONS?
23. THANKS FOR LISTENING! PAUL MCBRIDE @pmcbride446 joind.in/16983