PHP7 brings a tremendous number of new features. Tonight, we will take a look at the null coalesce operator, new execution order (uniform variable syntax), new exceptions and more.

2. WELCOME!

3. MY FAMILY

4. HONEY BEES

5. NEW TECHNOLOGY

6. WITH MUCH GRATITUDE.
• Many, many hours represented:
• 189 people
• 10,033 commits
• All to give us a better programming language.

7. 5+1=

8. 5+1=7

9. PHP6?

10. HTTPS://PHILSTURGEON.UK/
PHP/
2014/
07/
23/
NEVERENDING-MUPPET-
DEBATE-OF-PHP-6-V-PHP-7

11. HTTPS://3V4L.ORG/
“EVAL”

12. NEW FEATURES
UPDATES
BREAKING CHANGES
IMPLEMENTATION

13. NULL COALESCEhttps://wiki.php.net/rfc/isset_ternary

14. $action = isset($_GET[‘action’])
? $_GET[‘action’]
: ‘default’;
< PHP 7.0

15. $action = isset($_GET[‘action’])
? $_GET[‘action’]
: (isset($_POST[‘action’])
? $_POST[‘action’]
: ($this->getAction()
? $this->getAction()
: $_’default’
)
);

16. ??

17. $_GET[‘value’] ??
$_POST[‘value’];

18. $key = (string) $key;
$keyName =
(null !== ($alias = $this->getAlias($key))) ? $alias : $key;
if (isset($this->params[$keyName])) {
return $this->params[$keyName];
} elseif (isset($this->queryParams[$keyName])) {
return $this->queryParams[$keyName];
} elseif (isset($this->postParams[$keyName])) {
return $this->postParams[$keyName];
}
return $default;

19. $key = (string) $key;
$keyName = $this->getAlias($key) ?? $key;
return $this->params[$keyName]
?? $this->queryParams[$keyName]
?? $this->postParams[$keyName];
PHP 7

20. 10 > 3 LINES.
NOT BAD.

21. IMPROVED STRONG TYPING SUPPORT
https://wiki.php.net/rfc/uniform_variable_syntax
https://wiki.php.net/rfc/return_types

22. function calculateShippingTo($postalCode)
{
$postalCode = (int)$postalCode;
}
calculateShippingTo(“66048”);
< PHP 7

23. Class/interface name (PHP 5.0)
self (PHP 5.0)
array (PHP 5.1)
callable (PHP 5.4)
bool (PHP 7)
float (PHP 7)
int (PHP 7)
string (PHP 7)
Source: http://php.net/manual/en/functions.arguments.php#functions.arguments.type-declaration

24. function calculateShippingTo(int $postalCode)
{
// …
}
calculateShippingTo(“66048”);
// $postalCode is cast to an integer
PHP 7

25. function test(string $val) {
echo $val;
}
test(new class {});
// Can’t convert: Fatal error: Uncaught
TypeError: Argument 1 passed to test()
must be of the type string, object given…

26. function test(string $val) {
echo $val;
}
test(new class {
public function __toString() {
return "Hey, PHP[tek]!";
}
});
// Outputs: string(14) "Hey, PHP[tek]!"

27. function calculateShippingTo(int $postalCode)
{
// …
}
//** separate file: **//
declare(strict_types = 1);
calculateShippingTo(“66048”);
// Throws: Catchable fatal error: Argument 1 passed
to calculateShippingTo() must be of the type
integer, string given

28. FUNCTION RETURN TYPES
• Return type goes after the function declaration:
function combine($str1, $str2): string
{
// …
}
function addProduct(): Product
{
// …
}

29. function calculateShippingTo(int $postalCode): float
{
return 5.11;
}
var_dump(echo calculateShippingTo(“66048”));
// float(5.11)
PHP 7

30. FAST-FORWARD:
https://wiki.php.net/rfc/union_types
https://wiki.php.net/rfc/typed-properties

31. SPACESHIP OPERATOR
https://wiki.php.net/rfc/combined-comparison-operator

32. <?php
usort($values, function($a, $b) {
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
});
< PHP 7

33. <=>

34. SPACESHIP OPERATOR
• Works with anything,
including arrays.
• 0 if equal
• 1 if left > right
• -1 if left < right
echo 6 <=> 6;
// Result: 0
echo 7 <=> 6;
// Result: 1
echo 6 <=> 7;
// Result: -1

35. <?php
usort($values, function($a, $b) {
return $a <=> $b;
});
PHP 7

36. HTTPS://3V4L.ORG/
96Cd4

37. GROUPED USE
DECLARATIONS
https://wiki.php.net/rfc/group_use_declarations

38. use MagentoFrameworkStdlibCookieCookieReaderInterface;
use MagentoFrameworkStdlibStringUtils;
use ZendHttpHeaderHeaderInterface;
use ZendStdlibParameters;
use ZendStdlibParametersInterface;
use ZendUriUriFactory;
use ZendUriUriInterface;
< PHP 7

39. use MagentoFrameworkStdlib{
CookieCookieReaderInterface,
StringUtils
};
use ZendHttpHeaderHeaderInterface;
use ZendStdlib{Parameters, ParametersInterface};
use ZendUri{UriFactory, UriInterface};
PHP 7

40. use MagentoFrameworkStdlib{
CookieCookieReaderInterface,
StringUtils as Utils
};
use ZendHttpHeaderHeaderInterface;
use ZendStdlib{Parameters, ParametersInterface};
use ZendUri{UriFactory, UriInterface};
PHP 7

41. ANONYMOUS
CLASSES
https://wiki.php.net/rfc/anonymous_classes

42. return new class extends Product {
function getWeight() {
return 5;
}
});
// code testing, slight modifications
// to classes
ANONYMOUS CLASSES

43. CLOSURE::CALL
https://wiki.php.net/rfc/closure_apply

44. $closure = function($context) {
return $context->value . "n";
};
$a = new class { public $value = "Hello"; };
$closure($a);
// Output: "Hello"
PHP 5.3

45. $closure = function() {
return $this->value . "n";
};
$a = new class { public $value = "Hello"; };
$aBound = $closure->bindTo($a);
$closure(); // Output: "Hello"
< PHP 7

46. $canVoidOrder = function() {
// executed within the $order context
return $this->_canVoidOrder();
}
$canVoidOrder = $canVoidOrder->bindTo($order, $order);
echo $canVoidOrder();
MAGENTO

47. $closure = function() {
return $this->value . "n";
};
$a = new class { public $value = "Hello"; };
$b = new class { public $value = "Test"; };
echo $closure->call($a); // Output: "Hello"
echo $closure->call($b); // Output: "Test"
PHP 7

48. GENERATOR
DELEGATION
https://wiki.php.net/rfc/generator-delegation

49. function generator1() {
for ($i = 0; $i < 5; $i++) { yield $i; }
for ($i = 0; $i < generator2(); $i++) {
yield $i;
}
}
function generator2() { /** … **/ }
< PHP 7

50. function mergeOutput($gen1, $gen2)
{
$array1 = iterator_to_array($gen1);
$array2 = iterator_to_array($gen2);
return array_merge($array1, $array2);
}
< PHP 7

51. function generator1() {
for ($i=0; $i<5; $i++) { yield $i; }
yield from generator2();
}
function generator2() { /** … **/ }
// array_merge for generators.
PHP 7

52. NULL COALESCE
STRONG-TYPE SUPPORT
SPACESHIP OPERATOR
GROUPED USE DECLARATIONS
ANONYMOUS CLASSES
CLOSURE::CALL
GENERATOR DELEGATION

53. NEW FEATURES
UPDATES
BREAKING CHANGES
IMPLEMENTATION

54. PHP7 PERFORMANCE
Source: http://www.lornajane.net/posts/2015/php-7-benchmarks

56. EXECUTION ORDER CHANGES
https://wiki.php.net/rfc/uniform_variable_syntax

57. $$foo[‘bar’]->baz();

58. EXECUTION ORDER CHANGES
• PHP <= 5.6 had a long list of execution order rules:
• Most of the time, the parser executed from left to
right.
• Breaking changes for some frameworks and some
code.

59. $foo->$bar[‘baz’];
{#1
$foo->result;
{
#2
PHP 5.6
{
#1
$result[‘baz’];
{
#2
PHP 7
$foo->$bar[‘baz’];

60. HTTPS://3V4L.ORG/
WN37p 1Obts
PHP 5.6 PHP 7

61. getClass()::CONST_NAME;
PHP 7

62. getClosure()();
PHP 7

63. EXCEPTIONS
• Exceptions now inherit the new Throwable interface.

64. try {}
catch (Exception $e){ /***/ }
try {}
catch (Throwable $e) { /***/ }

65. EXCEPTIONS
• New Error class for:
• ArithmeticError
• DivisionByZeroError
• AssertionError
• ParseError
• TypeError

66. EXCEPTIONS
try {
$test = 5 % 0;
} catch (Error $e) {
var_dump($e);
}
// throws DivisionByZeroError
try {
$test = “Test”;
$test->go();
} catch (Error $e) {
var_dump($e);
}
// throws Error

67. FILTERED
UNSERIALIZATIONS
https://wiki.php.net/rfc/secure_unserialize

68. UNSERIALIZE
• Now takes an additional argument: $options
• allowed_classes:
• false: don’t unserialize any classes
• true: unserialize all classes
• array: unserialize specified classes

69. unserialize($value, [
‘allowed_classes’ => false
]);
unserialize($value, [
‘allowed_classes’ => [
‘BlueModelsUserModel’
]
]);
PHP 7

70. NEW FEATURES
UPDATES
BREAKING CHANGES
IMPLEMENTATION

71. BREAKING CHANGES

72. BREAKING CHANGES
• mysql_/ereg functions removed.
• https://pecl.php.net/package/mysql
• Calling a non-static function statically.
• ASP-style tags

73. BREAKING CHANGES
• list() assigns variables in proper order now:
• call_user_method() and
call_user_method_array() removed.
list($a[], $a[], $a[]) = [1, 2, 3];
// PHP 5.6 output: 3, 2, 1
// PHP 7 output: 1, 2, 3

74. HTTP://PHP.NET/
MANUAL/
EN/
MIGRATION70.INCOMPATIBLE.PHP

75. NEW FEATURES
UPDATES
BREAKING CHANGES
IMPLEMENTATION

76. PHP7 HAS NOT
BEEN WIDELY
ADOPTED. YET.

77. 0.7% ADOPTION
SO FAR.
Source: https://w3techs.com/technologies/details/pl-php/all/all

78. WE CAN
CHANGE THAT.

79. UPGRADE CONSIDERATIONS
• PHP7 is production-ready.
• Few have adopted it.
• If you release, you may encounter issues that haven’t
been discussed online.

80. UPGRADE CONSIDERATIONS
• What removed functions does your code depend on?
• https://github.com/sstalle/php7cc
• Run your unit tests against your code on a box with
PHP7.
• Try to release on a new server:
• Will give you a backup if something major happens.

81. • puphpet.com: choose PHP 7 as the version to install.
• https://www.digitalocean.com/community/tutorials/
how-to-upgrade-to-php-7-on-centos-7
• https://www.digitalocean.com/community/tutorials/
how-to-upgrade-to-php-7-on-ubuntu-14-04
INSTALLING PHP7

82. FURTHER READING
• https://leanpub.com/php7/read
• Excellent read about every new PHP 7 feature.
• http://php.net/manual/en/migration70.new-
features.php
• PHP’s documentation

83. TAKE-AWAYS
• Take advantage of the new features.
• Upgrade.
• Encourage your friends about PHP7.
• Together, we will get the industry moved to PHP7!

84. THANK YOU!