In this talk I'll present some of the new features of PHP 7. I will present the scalar type and return type declarations, the spaceship and null coalescing operators, the anonymous classes, the new Error exception, the security features, etc. Moreover, I will present some benchmarks and use cases of PHP 7 regarding the huge performance improvement.

1. THENEWFEATURESOFPHP7THENEWFEATURESOFPHP7
by -
Senior Software Engineer
, a Rogue Wave Company (USA)
, Milan, 25th Nov. 2016
Enrico Zimuel @ezimuel
Zend Technologies
Codemotion

3. PHPPHP
PHP: Hypertext Preprocessor
The most popular server-side language: PHP is used by
82.3% of all the websites (source: )
Used by Facebook, Wikipedia, Yahoo, Etsy, Flickr,
Digg, etc
21 years of usage, since 1995
Full OOP support since PHP 5
w3techs.com

4. PHPECOSYSTEMPHPECOSYSTEM
CMS: , , , etc
E-commerce: , , , etc
CRM: , , , , etc
Wiki: , , , etc
Framework: , , , etc
Drupal Wordpress Joomla
Magento OpenCart PrestaShop
CiviCRM SugarCRM Vtiger Zurmo
DokuWiki MediaWiki PmWiki
Laravel Symfony Zend Framework

5. PHP7PHP7
Released: 3 December 2015
Last major was , 13 July 2004 (11 years!)PHP 5
Last release is (10 Nov 2016)7.0.13

6. PHP6?PHP6?
Unicode support at the core language level
Not released, project is abandoned

7. PHPDEADLINESPHPDEADLINES
Version Release Supported until
5.3 30 June 2009 14 August 2014
5.4 1 March 2012 3 September 2015
5.5 20 June 2013 21 July 2016
5.6 28 August 2014 31 December 2018
7.0 3 December 2015 3 December 2018
7.1 December 2016? 3 years

8. PHP7INANUTSHELLPHP7INANUTSHELL
Great performance (thanks to )
Return/Scalar Type Declarations
Cryptographic secure pseudo-random number
generator (CSPRNG)
Anonymous Classes
Combined Comparison (Spaceship) Operator
Null coalescing operator
New Error hierarchy
PHPNG

9. PERFORMANCEPERFORMANCE
, PHP Next GenerationPHPNG
Project by Dmitry Stogov ( )Zend
New data structure management in the PHP engine
Great performance improvement!

10. BENCHMARKBENCHMARK
$a = [];
for ($i = 0; $i < 1000000; $i++) {
$a[$i] = ["hello"];
}
echo memory_get_usage(true);
PHP 5.6 PHP 7
Memory Usage 428 MB 33 MB
Execution time 0.49 sec 0.06 sec

11. OTHERLANGUAGESOTHERLANGUAGES
PHP 7 is also faster than !Python 3

12. PHP 7 is also faster than !Python 3
WORDPRESSWORDPRESS

13. CASESTUDIESCASESTUDIES
Badoo saved one million dollars switching to PHP 7
( )
Tumblr reduced the latency and CPU load by half
moving to PHP 7 ( )
Dailymotion handles twice more traffic with same
infrastructure switching to PHP 7 ( )
source
source
source

14. RETURNTYPEDECLARATIONSRETURNTYPEDECLARATIONS
function foo(): array {
return [];
}
function bar(): DateTime {
return null; // invalid
}
More information: PHP documentation

15. SCALARTYPEDECLARATIONSSCALARTYPEDECLARATIONS
declare(strict_types=1);
function sendHttpStatus(int $statusCode, string $message) {
header('HTTP/1.0 ' .$statusCode. ' ' .$message);
}
sendHttpStatus(404, "File Not Found"); // ok
sendHttpStatus("403", "OK"); // fatal error
function add(float $a, float $b): float {
return $a + $b;
}
add(1, 2); // float(3)
More information: PHP documentation

16. CSPRNGCSPRNG
Cryptographically secure pseudo-random number
generators
// generates a random number between 1 and 100
$num = random_int(1,100);
// generates a random string of 1 Kb
$bytes = random_bytes(1024);
More information: PHP documentation

17. ANONYMOUSCLASSESANONYMOUSCLASSES
/* return an anonymous class */
return new class($controller) implements Page {
public function __construct($controller) {
/* ... */
}
/* ... */
};
class Foo {}
$child = new class extends Foo {};
var_dump($child instanceof Foo); // true
More information: PHP documentation

18. SPACESHIPOPERATORSPACESHIPOPERATOR
A <=> B
0 if A == B, 1 if A > B, -1 if A < B
echo 1 <=> 1; // 0
echo 1 <=> 2; // -1
echo 2 <=> 1; // 1
echo "a" <=> "a"; // 0
echo "a" <=> "b"; // -1
echo "b" <=> "a"; // 1

19. NULLCOALESCINGNULLCOALESCING
?? operator
// Fetches the value of $_GET['user'] and returns 'nobody'
// if it does not exist.
$username = $_GET['user'] ?? 'nobody';
// This is equivalent to:
$username = isset($_GET['user']) ? $_GET['user'] : 'nobody';
// Coalescing can be chained
$username = $_GET['user'] ?? $_POST['user'] ?? 'nobody';

20. NEWERRORHIERARCHYNEWERRORHIERARCHY
Throwable: Error, Exception
function call_method($obj) {
$obj->method();
}
try {
call_method(null); // oops!
} catch (Error $e) {
printf ("Error: %sn", $e->getMessage());
} catch (Exception $e) {
printf ("Exception: %sn", $e->getMessage());
}
More information: PHP documentation

21. MUCHMORE...MUCHMORE...
Consistent 64-bit support
Fix list() behavior inconsistency
Filtered unserialize()
Group use declarations
Closure::call()
Expectations
...
Check the at php.netPHP 7 new features

22. PHP7.1PHP7.1
Nullable types
Void return types
Deprecation of Mcrypt ext
Support of in OpenSSL
Support class constant visibility
Iterable pseudo-type
...
Authenticated Encryption
Check the at php.netPHP 7.1 new features

23. THANKS!THANKS!
Contact me: enrico.zimuel [at] roguewave.com
Blog and web site: www.zimuel.it
Follow me: @ezimuel
This work is licensed under a
.
I used to make this presentation.
Creative Commons Attribution-ShareAlike 3.0 Unported License
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