What's New in PHP 5.5

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In this presentation we will cover the best features and additions in PHP 5.5. You can look forward to the following:

* Support for generators has been added via the yield keyword
* Usage of the new finally keyword in try-catch blocks
* An overview and examples of the new password hashing API
* The foreach control structure now supports unpacking nested arrays into separate variables via the list() construct
* empty() supports arbitrary expressions such as closures returning false
* array and string literal dereferencing
* The Zend Optimiser+ opcode cache (via the new OPcache extension)

Transcript

1. WHAT'S NEW IN PHP 5.5 · Corey Ballou @cballou
2. GENERATORS Support for generators has been added via the yield keyword r a n g e ( 0 , 1 0 0 0 0 0 0 ) vs. user supplied function
3. EXAMPLE USAGE OF YIELD KEYWORD f u n c t i o n g e t L i n e s ( $ f i l e p a t h ) { $ f = f o p e n ( $ f i l e p a t h , ' r ' ) ; t r y { w h i l e ( $ l i n e = f g e t s ( $ f ) ) { y i e l d $ l i n e ; } } f i n a l l y { f c l o s e ( $ f ) ; } } f o r e a c h ( g e t L i n e s ( " f i l e . t x t " ) a s $ n = > $ l i n e ) { e c h o $ l i n e ; }
4. THE "FINALLY" KEYWORD IS FINALLY HERE Execute code ALWAYS. t r y { t h r o w n e w E x c e p t i o n ( ' h e l l o ' ) ; } c a t c h ( E x c e p t i o n $ e ) { e c h o $ e - > g e t M e s s a g e ( ) ; } f i n a l l y { / / t h i s c o d e w i l l a l w a y s b e r u n e c h o ' , w o r l d ' ; }
5. PASSWORD HASHING API A super easy library that uses underlying crypt library. p a s s w o r d _ g e t _ i n f o ( ) p a s s w o r d _ h a s h ( ) p a s s w o r d _ n e e d s _ r e h a s h ( ) p a s s w o r d _ v e r i f y ( )
6. EXAMPLE OF REGISTER/LOGIN f u n c t i o n r e g i s t e r ( $ u s e r n a m e , $ p a s s w o r d ) { $ h a s h = p a s s w o r d _ h a s h ( $ p a s s w o r d , P A S S W O R D _ B C R Y P T ) ; / / s a v e h a s h t o d a t a b a s e } f u n c t i o n l o g i n ( $ u s e r n a m e , $ p a s s w o r d ) { $ h a s h = g e t H a s h F r o m D b B y U s e r n a m e ( $ u s e r n a m e ) ; i f ( p a s s w o r d _ v e r i f y ( $ p a s s w o r d , $ h a s h ) ) { / / p e r f o r m l o g i n ( s t o r e s e s s i o n v a r ) r e t u r n t r u e ; } r e t u r n f a l s e ; }
7. INCREASING PASSWORD SECURITY You can optionally supply your own salt and algorithmic cost. f u n c t i o n r e g i s t e r ( $ u s e r n a m e , $ p a s s w o r d ) { $ o p t i o n s = a r r a y ( ' s a l t ' = > ' s o m e R a n d o m S a l t ' , ' c o s t ' = > 1 2 ) ; $ h a s h = p a s s w o r d _ h a s h ( $ p a s s w o r d , P A S S W O R D _ B C R Y P T , $ o p t i o n s ) ; / / s a v e h a s h t o d a t a b a s e }
8. EXAMPLE OF UPGRADING YOUR HASHING ALGORITHM f u n c t i o n l o g i n ( $ u s e r n a m e , $ p a s s w o r d ) { $ h a s h = g e t H a s h F r o m D b B y U s e r n a m e ( $ u s e r n a m e ) ; i f ( p a s s w o r d _ v e r i f y ( $ p a s s w o r d , $ h a s h ) ) { / / c h e c k i f h a s h i s i n u p d a t e d f o r m a t i f ( p a s s w o r d _ n e e d s _ r e h a s h ( $ h a s h , P A S S W O R D _ B C R Y P T ) ) { / / p e r f o r m u p d a t e $ h a s h = p a s s w o r d _ h a s h ( $ p a s s w o r d , P A S S W O R D _ B C R Y P T ) ; / / s a v e n e w h a s h t o d a t a b a s e } / / p e r f o r m l o g i n ( s t o r e s e s s i o n v a r ) r e t u r n t r u e ; } r e t u r n f a l s e ; }
9. FOREACH + LIST $ a r r a y = [ [ 1 , 2 ] , [ 3 , 4 ] , ] ; f o r e a c h ( $ a r r a y a s l i s t ( $ a , $ b ) ) { e c h o " A : $ a ; B : $ b \ n " ; }
10. A R R A Y _ C O L U M N ( ) FUN $ p e o p l e = [ [ ' f i r s t n a m e ' = > ' J o h n ' , ' l a s t n a m e ' = > ' D o e ' ] , [ ' f i r s t n a m e ' = > ' J a n e ' , ' l a s t n a m e ' = > ' D o e ' ] , ] ; / / c o n t a i n s [ 0 = > ' J o h n ' , 1 = > ' J a n e ' ] $ f i r s t n a m e s = a r r a y _ c o l u m n ( $ p e o p l e , ' f i r s t n a m e ' ) ;
11. IMPROVEMENTS TO EMPTY() f u n c t i o n a l w a y s _ f a l s e ( ) { r e t u r n f a l s e ; } i f ( e m p t y ( a l w a y s _ f a l s e ( ) ) ) { e c h o " H e l l o , w o r l d . " ; }
12. ARRAY AND STRING LITERAL DEREFERENCING / / a r r a y d e r e f e r e n c i n g e c h o [ 1 , 2 , 3 ] [ 0 ] ; / / s t r i n g d e r e f e r e n c i n g e c h o ' P H P ' [ 0 ] ;
13. NOW LET'S REALLY GET CRAZY... f u n c t i o n f o o ( ) { r e t u r n a r r a y ( 1 , 2 , 3 ) ; } e c h o f o o ( ) [ 2 ] ; / / p r i n t s 3 $ f u n c = f u n c t i o n ( ) { r e t u r n a r r a y ( ' a ' , ' b ' , ' c ' ) ; } ; e c h o $ f u n c ( ) [ 0 ] ; / / p r i n t s a
14. ZEND OPTIMISER+ OPCACHE EXTENSION Not a replacement for APC/memcache(d). No user cache! Available in PHP 5.4 via install. Source available: https://github.com/zend- dev/ZendOptimizerPlus $ p h p - v P H P 5 . 4 . 1 7 R C 1 ( c l i ) ( b u i l t : J u n 2 2 2 0 1 3 1 9 : 2 7 : 2 6 ) C o p y r i g h t ( c ) 1 9 9 7 - 2 0 1 3 T h e P H P G r o u p Z e n d E n g i n e v 2 . 4 . 0 , C o p y r i g h t ( c ) 1 9 9 8 - 2 0 1 3 Z e n d T e c h n o l o g i e s w i t h Z e n d O P c a c h e v 7 . 0 . 2 , C o p y r i g h t ( c ) 1 9 9 9 - 2 0 1 3 , b y Z e n d T e c h n o l o g i e s
15. SO, UH, WHAT IS AN OPCODE CACHE? Component designed to speed up performance of PHP without altering the app. Overrides PHP's default compiler callback by checking if a compiled intermediate-code version of the code is available in-memory. It skips compilation when it can!
16. WHAT TO DO ABOUT DEPRECATED APC MODULE? APC User Cache is in the works: APC minus the opcode cache! github.com/krakjoe/apcu
17. BACKWARDS INCOMPATIBLE CHANGES Win XP/2003 support dropped self, parent and static are case insensitive p a c k ( ) and u n p a c k ( ) made more compatible with perl http://www.php.net/manual/en/migration55.deprecated.php
18. CREDITS php.net - What has changed in PHP 5.5.x wiki.php.net - Integrating Zend Optimizer+ into the PHP distribution schlueters.de - Features in PHP trunk: Array dereferencing slideshare.net - What's new in PHP 5.5 stackoverflow.com - How do you use bcrypt for hashing passwords in PHP?
19. QUESTIONS? COMMENTS? Thanks for pretending to enjoy my banter!