The document discusses PHP 7, highlighting its performance improvements and features like scalar type declarations and the null coalesce operator. It mentions the abandonment of PHP 6 and compares PHP 7 with HHVM regarding compatibility and deployment challenges. The content also covers various new functionalities and enhancements introduced in PHP 7, aimed at developers and the PHP community.

1. PHP 7

2. PHP 7
4developers, 11 April 2016
Michał Pipa

3. About me
Michał Pipa ( )
Software developer, trainer
Zend Certi ed Engineer
Free software enthusiast ( )
(#symfony-pl)
@michalpipa
Symfony
PHPers Silesia
Polish Symfony Community

4. PHP 7

5. phpng

6. Wait, what about
PHP 6?

7. PHP 6 was abandoned in March
2010

8. PHP 6 = PHP 5.3 + unicode

9. unicode = PHP 6 - PHP 5.3

10. PHP 7 vs. HHVM

11. Why not HHVM?
Deploying is not easy and slow
Compatibility
Incompatible extensions
Developed by single company

12. Is PHP 7 ready for
production use?

13. Who is using PHP
7?
Etsy
Badoo

14. PHP 7: Improved performance
and memory usage
PHP's new hashtable implementation
Internal value representation in PHP 7

15. PHP 7: Return Type Declarations
function foo(): array {
return [];
}

16. PHP 7: Scalar Type Declarations
<?php
declare(strict_types=1);
function add(int $a, int $b): int {
return $a + $b;
}

17. PHP 7: Scalar Type Declarations
type checking mode for parameter types depends on the le where
the function is called
type checking mode for return types depends on the le where the
function is de ned

18. PHP 7: Anonymous Classes
var_dump(new class($i) {
public function __construct($i) {
$this->i = $i;
}
});

19. PHP 7: Combined Comparison
(Spaceship) Operator: <=>

20. PHP 7: Uniform Variable Syntax

21. PHP 7: Null Coalesce Operator:
??
isset($_GET['user']) ? $_GET['user'] : 'nobody'
$_GET['mykey'] ?: ""
$_GET['user'] ?? 'nobody'

22. PHP 7: Easy User-land CSPRNG
$randomStr = random_bytes($length = 16);
$randomInt = random_int($min = 0, $max = 127);

23. PHP 7: Group Use Declarations
use DoctrineCommonCollectionsExprComparison;
use DoctrineCommonCollectionsExprValue;
use DoctrineCommonCollectionsExprCompositeExpression;
use DoctrineCommonCollectionsExpr{ Comparison, Value, CompositeExpression };

24. PHP 7: intdiv()
intdiv(int $numerator, int $divisor)

25. PHP 7: Removed PHP 4
Constructors

26. PHP 7: Reserve More Types in
PHP 7

27. PHP 7: Remove alternative PHP
tags
ASP tags
script tags

28. PHP 7: Remove the
date.timezone warning

29. PHP 7: Exceptions in the engine
Before: Fatal error: Call to a member function method() on a non-object
After: Fatal error: Uncaught exception 'EngineException' with message
'Call to a member function method() on a non-object'

30. PHP 7: Abstract syntax tree

31. Tools
php7mar
Phan
Exakat
Tuli

32. Online PHP & HHVM shell, execute code in 100+ di erent versions!
3v4l.org

33. PHP specification

34. Thank you

35. Questions?