- https://aye.sh/talk/php81-drupalconeur-2021 - php.watch/versions/8.1

1. PHP 8.1
What’s new and changed
Ayesh Karunaratne | https://aye.sh/talk/php81-drupalconeur-2021
#DrupalConEur

2. PHP 8.1
What’s new and changed
Ayesh Karunaratne | https://aye.sh/talk/php81-drupalconeur-2021
#DrupalConEur

3. @Ayeshlive | @phpwch
https://aye.sh | https://php.watch
Ayesh Karunaratne
Freelance Software Developer, Security Researcher, Full-time
traveler
ayesh@aye.sh
Kandy, Sri Lanka - Everywhere

4. PHP 8.1
New and changed

5. New and changed
PHP 8.1

6. PHP 8.1
PHP 8.0 General Availability
2020 Nov 26
2021 Nov 25
14 Jun 2021 PHP 8.1 - First alpha
20 Jul 2021 Feature-freeze / First beta
2021 Oct 04 DrupalCon Europe
02 Sep 2021 First Release Candidate

7. New Features
Enums
Fibers
Readonly Properties
Changed Functionality
Deprecations
Backwards Compatibility
PHP 8.1: New and Changed
Type System Improvements
Misc.
Testing out today

8. Enums
Fibers
Readonly
Properties
PHP 8.1: New and Changed
Type
System
Improvements
Misc.
New Features Changed Functionality Deprecations
Backwards
Compatibility
Testing out today

9. PHP 8.1
New Features

10. New Features
Enums

11. core/modules/comment/src/Plugin/Field/FieldType/CommentItemInterface.php
New Features: Enums

12. core/modules/comment/src/Plugin/Field/FieldType/CommentItemInterface.php
New Features: Enums

13. New Features: Enums

14. New Features: Enums

15. New Features: Enums

16. New Features: Enums

17. New Features: Enums
core/modules/comment/src/Plugin/views/filter/NodeComment.php

18. New Features: Enums
core/modules/comment/src/Plugin/views/filter/NodeComment.php

19. New Features: Enums

20. New Features: Enums

21. New Features: Enums

22. New Features: Enums

23. New Features: Enums

24. New Features: Enums

25. New Features: Enums

26. New Features: Enums

27. New Features: Enums

28. New Features: Enums

29. New Features: Enums

30. New Features: Enums

31. New Features: Enums

32. New Features: Enums

33. New Features: Enums

34. New Features: Enums

35. New Features: Enums

36. New Features: Enums

37. New Features: Enums

38. • Enums can have zero or more members
New Features: Enums

39. • Enums can have zero or more members
New Features: Enums

40. • Enums can have zero or more members
• Enum members are objects
is_object(Suit::Hearts);
// true
New Features: Enums

41. • Enums can have zero or more members
• Enum members are objects
var_dump(Suit::Hearts);
// enum(Suit::Hearts)
New Features: Enums

42. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
New Features: Enums

43. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
New Features: Enums

44. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
New Features: Enums

45. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
New Features: Enums

46. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
Suit::cheer();
// Yay!
New Features: Enums

47. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
• May contain non-staticmethods
Suit::Clubs->show();
New Features: Enums

48. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
• May contain non-static methods
• $this refers to the Enumerated element
Suit::Clubs->show();
enum(AppPlayingCardsSuit::Clubs)
New Features: Enums

49. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
• May contain non-static methods
• $this refers to the Enumerated element
• ->nameproperty is the name of the member
Suit::Clubs->show();
enum(AppPlayingCardsSuit::Clubs)
string(5) "Clubs"
string(5) "Clubs"
New Features: Enums

50. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
• May contain non-static methods
• $this refers to the Enumerated element
• ->nameproperty is the name of the member
• ->value property is the backed value
Suit::Clubs->show();
enum(AppPlayingCardsSuit::Clubs)
string(5) "Clubs"
string(5) "Clubs"
string(6) "♣️"
string(6) "♣️"
New Features: Enums

51. • Enums can have zero or more members
• Enum members are objects
• Enums can be namespaced and autoloaded
• May contain string|int backed values
• May contain non-duplicated constants
• May contain static methods
• May contain non-static methods
• $this refers to the Enumerated element
• ->nameproperty is the name of the member
• ->value property is the backed value
Suit::Clubs->show();
enum(AppPlayingCardsSuit::Clubs)
string(5) "Clubs"
string(5) "Clubs"
string(6) "♣️"
string(6) "♣️"
New Features: Enums

52. Class Semantics
• Supports namespaces
• Supports traits
• Supports autoloading
• Supports magic constants
• Supports instanceof
• Supports methods
New Features: Enums

53. Enum Semantics
• Must not contain state
New Features: Enums

54. Enum Semantics
• Must not contain state
• Enum members are identical
to same member
New Features: Enums

55. New Features: Enums

56. New Features: Enums

57. $connection->insert('mytable')
->fields([
'entity_id' => $entity->getId(),
'comment' => $commentState->value,
])
->execute();
New Features: Enums

58. $connection->insert('mytable')
->fields([
'entity_id' => $entity->getId(),
'comment' => $commentState->value,
])
->execute();
New Features: Enums

59. $database->query("
SELECT entity_id
FROM {my_table}
WHERE status = :status",
[':status' => CommentStatus::OPEN->value]
);
New Features: Enums

60. $database->query("
SELECT entity_id
FROM {my_table}
WHERE status = :status",
[':status' => CommentStatus::OPEN->value]
);
New Features: Enums

61. $database->query("
SELECT entity_id
FROM {my_table}
WHERE status = :status",
[':status' => CommentStatus::OPEN->value]
);
New Features: Enums

62. $database->query("
SELECT entity_id
FROM {my_table}
WHERE status = :status",
[':status' => CommentStatus::OPEN->value]
);
New Features: Enums

63. $state = $formState->getValue('comment_state');
$state = CommentStatus::from($state);
$node->setCommentState($state);
New Features: Enums

64. $state = $formState->getValue('comment_state');
$state = CommentStatus::from($state);
$node->setCommentState($state);
New Features: Enums

65. $state = $formState->getValue('comment_state');
$state = CommentStatus::from($state);
$node->setCommentState($state);
New Features: Enums
enum(CommentStatus::Open)

66. New Features
Fibers

67. New Features: Fibers
Lightweight and controlled concurrency to PHP
A Fiber is a code block that maintains its own stack (variables and state), that can be
started, suspended, or terminated cooperatively by the main code and the Fiber.
Fibers

68. New Features: Fibers
Normal Execution Flow
Start End

69. New Features: Fibers
Concurrent Execution Flow
Start End

70. New Features: Fibers
Concurrent Execution Flow
Start End

71. New Features: Fibers
Concurrent Execution Flow
Start End

72. New Features: Fibers
Concurrent Execution Flow
Start End
$fiber = new Fiber();
$fiber->start();
Fiber::suspend()
$fiber->resume()
Fiber::suspend()
$fiber->resume()

73. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";

74. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";

75. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";

76. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";

77. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";

78. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started

79. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started

80. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started

81. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started

82. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started

83. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started
Fiber returned

84. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started
Fiber returned

85. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started
Fiber returned
Fiber resumed

86. New Features: Fibers
echo "Main started";
$fiber = new Fiber(function(): void {
echo "Fiber started";
Fiber::suspend();
echo "Fiber resumed";
});
$fiber->start();
echo "Fiber returned";
$fiber->resume();
echo "Fiber Ended";
Main started
Fiber started
Fiber returned
Fiber resumed
Fiber Ended

87. New Features: Fibers
final class Fiber {
public function __construct(callable $callback) {}
public function start(mixed ...$args): mixed {}
public static function suspend(mixed $value = null): mixed {}
public function resume(mixed $value = null): mixed {}
public static function getCurrent(): ?self {}
public function getReturn(): mixed {}
public function throw(Throwable $exception): mixed {}
public function isStarted(): bool {}
public function isSuspended(): bool {}
public function isRunning(): bool {}
public function isTerminated(): bool {}
}
https://php.watch/versions/8.1/fibers

88. New Features
Readonly Properties

89. New Features: Readonly Properties
Properties with the readonly flag can only be initialized
from object scope, and cannot be overwritten.
Readonly Properties

90. New Features: Readonly Properties

91. New Features: Readonly Properties

92. New Features: Readonly Properties

93. New Features: Readonly Properties

94. New Features
Type System Improvements

95. New Features: Type System Improvements
Intersection Types

96. New Features: Type System Improvements
Intersection Types

97. New Features: Type System Improvements
Intersection Types

98. New Features: Type System Improvements
Intersection Types

99. New Features: Type System Improvements
Intersection Types

100. New Features: Type System Improvements
Intersection Types

101. New Features: Type System Improvements
type

102. New Features: Type System Improvements
type

103. New Features: Type System Improvements
type

104. New Features
Other New Features

105. New Features: Other New Features
• Final class constants
• New and functions
• New function
• Sodium functions
• First-class callable syntax
• Explicit Octal numeral notation
• xxHash and MurmurHash3 hashing algorithms
• Directory-upload support with

106. Changed Functionality

107. Changed Functionality
Tentative Return Types

108. Changed Functionality
Tentative Return Types

109. Changed Functionality
Tentative Return Types

110. Changed Functionality
Tentative Return Types

111. Changed Functionality
Tentative Return Types

112. Changed Functionality
Tentative Return Types

113. Changed Functionality
Variable Restrictions

114. Changed Functionality
Variable Restrictions

115. Changed Functionality
Resource to Object Migrations
Extension resource (PHP < 8.1) object (PHP >= 8.1)
GD gd font (integer) GdFont
FTP ftp FTPConnection
IMAP imap IMAPConnection
finfo file_info finfo
PSpell pspell (int) PSpellDictionary
PSpell pspell config (int) PSpellConfig
LDAP ldap link LDAPConnection
LDAP ldap result LDAPResult
LDAP ldap result entry LDAPResultEntry
PgSQL pgsql link PgSqlConnection
PgSQL pgsql result PgSqlResult
PgSQL pgsql large object PgSqlLob

116. Deprecations

117. Deprecations
• Passing to non-nullable internal function parameters is deprecated
• Return types in PHP built-in class methods and deprecation notices
• Automatic conversion of "false" into an empty array on write operands is deprecated.
• Serializable interface deprecated
• Implicit incompatible float to int conversion is deprecated
• Calling a static method or accessing a static property directly on a trait is deprecated
• mysqli::get_client_info method and mysqli_get_client_info($param) is deprecated
• date_sunrise, date_sunset functions and related INI settings are deprecated
• strftime() and gmstrftime() functions are deprecated
• mhash*() functions (hash extension) are deprecated
• filter.default and filter.default_options INI settings are deprecated
• PDO::FETCH_SERIALIZE is deprecated
• auto_detect_line_endings INI directive is deprecated
• MySQLi: mysqli_driver->driver_version property is deprecated

118. Backwards Compatibility

119. Backwards Compatibility
Drupal 10
Drupal 9.3
Drupal 8.9 – Until Nov 2021
Drupal 7 – Until Nov 2022

120. Backwards Compatibility

121. Trying Out PHP 8.1

122. Trying Out PHP 8.1
Try it online with 3v4l.org

123. Trying out Enums today
Nightly Docker Images
docker pull phpdaily/php:8.1-dev

124. Trying out Enums today
Compiled Windows Binaries
https://windows.php.net/qa/ https://www.apachehaus.com/cgi-
bin/download.plx

125. Trying out Enums today
Self-compile PHP from source
$ git clone git@github.com:php/php-src.git
$ ./buildconf
$ ./configure
$ make -j$(nproc)
$ ./sapi/cli/php -a
https://php.watch/articles/compile-php-ubuntu
https://php.watch/articles/compile-php-fedora-rhel-centos

126. Further Resources
• https://aye.sh/talk/php81-drupalconeur-2021
• https://php.watch/versions/8.1/enums
• https://php.watch/versions/8.1/fibers
• https://php.watch/versions/8.1/readonly
• https://php.watch/versions/8.1
• https://github.com/phpdaily/php
• https://3v4l.org/
• https://php.watch/articles/compile-php-ubuntu
• https://php.watch/articles/compile-php-fedora-rhel-centos

127. Questions?
No question is too small.
#DrupalConEur @Ayeshlive ayesh@php.watch
https://aye.sh/talk/php81-drupalconeur-2021

128. Thank You
Dank u
dankie
faleminderit
‫لك‬ ‫شكرا‬
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hvala
благодаря
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M
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děkuji
tak
tänan
kiitos
Благодаря ти
danke
ευχαριστώ
mahalo
.
‫תודה‬
dhanyavād
köszönöm
takk
terima kasih
grazie
arigatô
cảm ơn bạn
paldies
choukrane
ačiū
Благодарам
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谢谢
Баярлалаа
dziękuję
obrigado
mulţumesc
спасибо
xвала
Ďakujem
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tack
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kop khun
teşekkür ederim
Дякую
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a dank ngiyabonga
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