PHP7 will have the most significant changes in the language since PHP 5.2 to 5.3. New features, better consistency and (100%) performance improvement are just some of the highlights.

1. Better & faster
Bruno Ricardo Siqueira
2015

2. ABOUT THE SPEAKER
Bruno Ricardo Siqueira.
Web developer and PHP evangelist
in Brazil. Docker enthusiast. Git
heavy user.
Working with Web Development
for the last 8 years, Bachelor in
Information Systems by University
of Sao Paulo ICMC - USP, currently
working at CI&T as Software
Engineer.

3. AGENDA
● Warming-up
○ Contextualization
○ Deprecations
○ Removals &
inconsistency reduction
● Looking inside
○ Memory
○ Performance
● New features
○ Unicode
○ Exception in the core
○ Anonymous classes
○ Operators
○ Declarations
○ Generators
● Near future & conclusions
● Questions

4. WARMING-UP

5. WARMING-UP - CONTEXTUALIZATION
● 2009 - PHP 5.3
○ Namespaces
○ Anonymous functions
● 2009 - PHP-FIG
● 2010 - HipHop for PHP
(HPHPc)
○ PHP -> C++ binary
● 2011 - HipHop Virtual Machine
(HHVM)
○ JIT -> HipHop ByteCode
● 2012 - PHP 5.4
○ Traits
○ Built in Webserver
● 2013 - PHP 5.5
○ Generators
○ OpCache in the core
● 2014 - HACK Language
● 2014 - PHP 5.6
○ Variadic Functions (...)
○ reusable php://input

7. WARMING-UP - CONTEXTUALIZATION

8. WARMING-UP - CONTEXTUALIZATION

9. WARMING-UP - CONTEXTUALIZATION

10. WARMING-UP - CONTEXTUALIZATION

11. PHP7 BETA2
24/07

12. ● PHP 4 constructors
● password_hash() option
WARMING-UP - DEPRECATIONS

13. WARMING-UP - REMOVALS & INCONSISTENCY REDUCTION
● date.timezone warning:
○ default value
● alternative tags:
○ <% opening tag
○ <%= opening tag with echo
○ %> closing tag
○ (<scripts+languages*=s*(php|"php"|'php')s*>)i
opening tag
○ (</script>)i closing tag
● multiple default blocks in switch constructions

14. WARMING-UP - REMOVALS & INCONSISTENCY REDUCTION
● SAPIs & extensions:
○ sapi/aolserver, sapi/apache, sapi/apache_hooks,
sapi/apache2filter, sapi/caudium, sapi/continuity,
sapi/isapi, sapi/milter, sapi/nsapi, sapi/phttpd,
sapi/pi3web, sapi/roxen, sapi/thttpd, sapi/tux,
sapi/webjames, ext/mssql, ext/mysql,
ext/sybase_ct, ext/ereg
○ moved to PECL
● hexadecimals in numeric strings
● E_STRICT Notices

15. WARMING-UP - REMOVALS & INCONSISTENCY REDUCTION
● Uniform Variable Syntax

16. LOOKING INSIDE

18. LOOKING INSIDE - MEMORY

19. LOOKING INSIDE - PERFORMANCE
● ZVALs PHP 5.X
○ (almost) always heap
allocated
○ reference counted &
cycle colletcion
○ duplicated refcount
(objects)
○ too much referencing, e.
g.: 1 object in 1 variable ->
4 pointers
● ZVALs PHP 7
○ simple values (int, bool…)
without head allocation &
without refcount
○ no more double refcount.
○ reusable values
independent of zval
structure

20. Smaller data structures.
Less allocations.
Less referencing.
BETTER PERFORMANCE!
LOOKING INSIDE - PERFORMANCE

23. 100% of
performance
improvement
in real
world
applications

24. NEW FEATURES

25. NEW FEATURES - UNICODE

26. NEW FEATURES - EXCEPTIONS IN THE CORE

27. NEW FEATURES - EXCEPTIONS IN THE CORE

28. NEW FEATURES - EXCEPTIONS IN THE CORE

29. NEW FEATURES - EXCEPTIONS IN THE CORE

30. NEW FEATURES - EXCEPTIONS IN THE CORE

31. NEW FEATURES - ANONYMOUS CLASSES

32. NEW FEATURES - OPERATORS spaceship operator <=>

33. NEW FEATURES - OPERATORS spaceship operator <=>

34. NEW FEATURES - OPERATORS spaceship operator <=>

35. NEW FEATURES - OPERATORS spaceship operator <=>

36. NEW FEATURES - OPERATORS spaceship operator <=>

37. NEW FEATURES - OPERATORS spaceship operator <=>

38. NEW FEATURES - OPERATORS spaceship operator <=>

39. NEW FEATURES - OPERATORS null coalesce operator ??

40. NEW FEATURES - OPERATORS null coalesce operator ??

41. NEW FEATURES - OPERATORS null coalesce operator ??

42. NEW FEATURES - OPERATORS null coalesce operator ??

43. NEW FEATURES - DECLARATIONS scalar types

44. NEW FEATURES - DECLARATIONS scalar types

45. NEW FEATURES - DECLARATIONS return types

46. NEW FEATURES - DECLARATIONS return types

47. NEW FEATURES - DECLARATIONS return types

48. NEW FEATURES - DECLARATIONS return types

49. NEW FEATURES - DECLARATIONS return types

50. NEW FEATURES - DECLARATIONS return types

51. NEW FEATURES - DECLARATIONS return types

52. NEW FEATURES - DECLARATIONS return types

53. NEW FEATURES - DECLARATIONS return types

54. NEW FEATURES - DECLARATIONS return types

55. NEW FEATURES - DECLARATIONS group use

56. NEW FEATURES - DECLARATIONS group use

57. NEW FEATURES - DECLARATIONS group use

58. NEW FEATURES - DECLARATIONS group use

59. NEW FEATURES - DECLARATIONS group use

60. NEW FEATURES - DECLARATIONS group use

61. NEW FEATURES - GENERATORS return expressions

62. NEW FEATURES - GENERATORS return expressions

63. NEW FEATURES - GENERATORS return expressions

64. NEW FEATURES - GENERATORS return expressions

65. NEW FEATURES - GENERATORS return expressions

66. NEW FEATURES - GENERATORS return expressions

67. NEW FEATURES - GENERATORS return expressions

68. NEW FEATURES - GENERATORS delegating generator

69. NEW FEATURES - GENERATORS delegating generator

70. NEW FEATURES - GENERATORS delegating generator

71. NEW FEATURES - GENERATORS delegating generator

72. NEW FEATURES - GENERATORS delegating generator

73. NEW FEATURES - GENERATORS delegating generator

74. NEW FEATURES - GENERATORS delegating generator

75. NEW FEATURES - GENERATORS delegating generator
return expressions + delegating generator…
Can you see the concurrency?

76. Lightweight
Threads
FTW!

77. NEAR FUTURE
& CONCLUSIONS

78. FUTURO PRÓXIMO

79. FUTURO PRÓXIMO
● PSR7 + Middleware pattern will
boost even more the PHP
packages reusability
● JIT + PHP Virtual Machine
● Language specification
● Better consistency
● AST will bring new/better
static analysis tools
● ...

81. QUESTIONS?

82. THANKS
FOR
BEING
HERE!
PHP7: better & faster
References: http://bit.ly/tdcsp-2015-php7
BRUNO RICARDO SIQUEIRA
@brunoric
https://joind.in/14853