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P H P CO N F. A S I A K E Y N OT E CC-BY-ND 2.0: Michaela Loheit

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h tt p : / /d e v e l o p e r. a ka m a i .co m

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Let’s start a conversation about mental health in tech mhprompt.org

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R E L E A S E M A N A G E R

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P H P I S D E A D CC-BY 2.0: Nana B Agyei

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S I N G L E - PAG E A P P L I C AT I O N S A R E T H E F U T U R E

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S I N G L E PA G E A P P L I C AT I O N S A R E T H E F U T U R E 2011 2016 Source: Google Trends

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S I N G L E PA G E A P P L I C AT I O N S A R E T H E F U T U R E 2011 2016 Source: Google Trends

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C L I E N T S I D E M VC F R A M E W O R K S A R E T H E F U T U R E

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C L I E N T S I D E M V C F R A M E W O R K S A R E T H E F U T U R E 2010 2016 angular react Source: Google Trends

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C L I E N T S I D E M V C F R A M E W O R K S A R E T H E F U T U R E 2010 2016 angular react Source: Google Trends

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J AVA S C R I PT I S T H E F U T U R E

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J AVA S C R I PT I S W I N N I N G 2004 2016

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J AVA S C R I PT I S 2004 2016

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W H AT A B O U T P H P ?

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P H P I S Source: Google Trends 2016 2004

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P H P I S J AVA S C R I PT Source: Google Trends 2016 2004

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N E W L A N G UAG E S A R E W I N N I N G

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R UST I S W I N N I N G 2012 2016 Source: Google Trends

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R UST I S W I N N I N G 2012 2016 Source: Google Trends

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G O L A N G I S W I N N I N G Source: Google Trends 2010 2016

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G O L A N G I S W I N N I N G 2010 2016 Source: Google Trends

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G O L A N G V S R UST 2010 2016 Golang Rust Source: Google Trends

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G O L A N G V S R UST V S P H P 2010 2016 Rust Golang PHP Source: Google Trends

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M AY B E I T ’ S T H E PA R A D I G M ?

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O BJ E CT O R I E N T E D V S F U N CT I O N A L P R O G R A M M I N G 2004 2016 Object-Oriented Functional Source: Google Trends

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O BJ E CT O R I E N T E D V S F U N CT I O N A L P R O G R A M M I N G 2004 2016 Object-Oriented Functional Source: Google Trends

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M AY B E I T ’ S T H E S K I L LS E T !

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F U L L STA C K D E V E LO P E R V S 1 0 X E N G I N E E R 2010 2016 Full Stack Developer 10X Engineer Source: Google Trends

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F U L L STA C K D E V E LO P E R V S 1 0 X E N G I N E E R 2010 2016 Full Stack Developer 10X Engineer Source: Google Trends

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F U L L STA C K D E V E LO P E R V S 1 0 X E N G I N E E R 2016 10X engineer Full Stack Developer PHP Developer Source: Google Trends

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R I P H P ? CC-BY 2.0: johnny myreng henriksen

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W H AT D O E S P R O G R E SS LO O K L I K E ? CC-BY 2.0: damon jah

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P H P U S A G E PHP ASP.NET Java Static Files Coldfusion Ruby Other 1% 0.6% 0.7% 1.5% 2.7% 15.8% 82.1% Source: w3techs

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P H P R E L E A S E S 2 3 4 5 6 7 8 9 2012-02 2012-05 2012-08 2012-11 2013-02 2013-05 2013-08 2013-11 2014-02 2014-05 2014-08 2014-11 2015-02 2015-05 2015-08 2015-11 2016-02 2016-05 Source: php-src git repository

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P H P V E RS I O N US A G E PHP 7.x PHP 5.x PHP 4.x 1.1% 97.8% 1.2% Source: w3techs

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CO N T E XT: 1 2 M O N T H S

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P H P 5 : T H E F I RST 1 2 M O N T H S PHP 5.0 Release Source: Google Trends

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P H P 7 : T H E F I RST 1 2 M O N T H S PHP 7.0 Release Source: Google Trends

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P H P 7 : T H E F I RST 1 2 M O N T H S PHP 7 PHP 5 Source: Google Trends PHP 5.0/7.0 Release

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T H I R D - PA RTY E CO SYST E M

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PAC K AG I ST: PA C KA G E S & R E L E A S E S 0K 150K 300K 450K 600K 2011-09 2011-12 2012-03 2012-06 2012-09 2012-12 2013-03 2013-06 2013-09 2013-12 2014-03 2014-06 2014-09 2014-12 2015-03 2015-06 2015-09 2015-12 2016-03 2016-06 568K 105K Packages Versions Source: Packagist

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PAC K AG I ST: PA C KA G E I N STA L LS ( AV E R AG E / D AY ) 0M 45M 90M 135M 180M 2012-04 2012-07 2012-10 2013-01 2013-04 2013-07 2013-10 2014-01 2014-04 2014-07 2014-10 2015-01 2015-04 2015-07 2015-10 2016-01 2016-04 169M Source: Packagist

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P H P : A F R A C TA L O F B A D D E S I G N CC-BY 2.0: Ian Baker A P R I L 9 T H 2 0 1 2

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P R E D I CTA B L E & CO N S I ST E N T CC-BY-SA: InSapphoWeTrust

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L AT E STAT I C B I N D I N G

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U N I F O R M VA R I A B L E SY N TA X

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L A N G UA G E S P E C I F I C AT I O N

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CO N C I S E CC-BY 2.0: Dean Hochman

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C LO S U R E S

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C A L L A B L E S

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T R A I TS

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G E N E R ATO RS

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A N O N Y M O US C L A SS E S

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R E L I A B L E CC-BY 2.0: mpclemens

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S H A R E D - N OT H I N G A R C H I T E CT U R E

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P H P- F P M

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D E B U G G A B L E CC-BY-SA 2.0: Peter Grima

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X D E B U G

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P H P D B G

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P H P I S N OT E VO LV I N G CC-BY 2.0: Duncan Hull

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S H O RT E C H O TAG S P H P 5 . 4

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B I N A R Y N U M B E RS P H P 5 . 4

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S H O RT A R R AY SY N TA X P H P 5 . 4

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A R R AY D E R E F E R E N C I N G P H P 5 . 4

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C LO S U R E $ T H I S B I N D I N G P H P 5 . 4

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C A L L A B L E TY P E H I N T P H P 5 . 4

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T R A I TS P H P 5 . 4

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B U I LT I N C L I S E R V E R P H P 5 . 4

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L I ST S U P P O RT I N FO R E A C H P H P 5 . 5

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A R B I T R A R Y E X P R E SS I O N S U P P O RT F O R E M P T Y ( ) P H P 5 . 5

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ST R I N G /A R R AY D E R E F E R E N C I N G P H P 5 . 5

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F I N A L LY B LO C K S P H P 5 . 5

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E XT/ PA SS W O R D P H P 5 . 5

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G E N E R ATO RS P H P 5 . 5

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L A N G UA G E S P E C I F I C AT I O N T H A N K S FAC E B O O K !

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E X P O N E N T O P E R ATO R ( T _ P O W ) P H P 5 . 6

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CO N STA N T S C A L A R E X P R E SS I O N S P H P 5 . 6

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P H P D B G P H P 5 . 6

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I M P O RT F U N CT I O N S / CO N STA N TS P H P 5 . 6

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VA R I A D I CS P H P 5 . 6

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A R G U M E N T U N PAC K I N G ( S P L AT ) P H P 5 . 6

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R E M O V E A LT E R N AT I V E P H P TA G S P H P 7 . 0

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R E M O V E P O S I X R E G E X P H P 7 . 0

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R E M O V E E XT/ M YS Q L P H P 7 . 0

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2 . 4 X FA ST E R P H P 7 . 0

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A BST R ACT SY N TA X T R E E P H P 7 . 0

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U N I F O R M VA R I A B L E SY N TA X P H P 7 . 0

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E N G I N E E XC E PT I O N S P H P 7 . 0

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U N I CO D E E S C A P E SY N TA X P H P 7 . 0

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N U L L COA L E S C E O P E R ATO R P H P 7 . 0

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B I N D C LO S U R E O N C A L L P H P 7 . 0

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G R O U P US E D E C L A R AT I O N S P H P 7 . 0

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G E N E R ATO R D E L E G AT I O N P H P 7 . 0

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G E N E R ATO R R E T U R N VA LU E S P H P 7 . 0

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A N O N Y M O US C L A SS E S P H P 7 . 0

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S C A L A R TY P E H I N TS P H P 7 . 0

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R E T U R N H I N TS P H P 7 . 0

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ST R I CT TY P E S P H P 7 . 0

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S PA C E S H I P O P E R ATO R P H P 7 . 0

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CO M B I N E D CO M PA R I S O N O P E R ATO R P H P 7 . 0

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T H E F U T U R E Credit: NASA/KSC

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TO O F E W A R G U M E N TS E XC E PT I O N

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TO O F E W A R G U M E N TS E XC E PT I O N • Throw an exception when too few arguments are passed to a user defined function/method regardless of strict types • Backwards compatibility break

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TO O F E W A R G U M E N TS E XC E PT I O N function hello($whom) { echo "Hello $whom"; } hello(); 1 2 3 4 5 6

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TO O F E W A R G U M E N TS E XC E PT I O N function hello($whom) { echo "Hello $whom"; } hello(); 1 2 3 4 5 6

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 Warning: Missing argument 1 for hello(), called in on line 6 and defined in on line 1

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 Notice: Undefined variable: what in on line 4 Hello

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TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 function hello($whom) { echo "Hello $whom"; } hello();

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function hello($whom) { echo "Hello $whom"; } hello(); TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 Fatal error: Uncaught Error: Too few arguments to function hello(), 0 passed in on line 6 and exactly 1 expected in :2

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TO O F E W A R G U M E N TS E XC E PT I O N function hello($whom) { echo "Hello $whom"; } try { hello(); } catch (\Error $e) { // Handle exception } 1 2 3 4 5 6 7 8 9 10

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TO O F E W A R G U M E N TS E XC E PT I O N function hello($whom) { echo "Hello $whom"; } try { hello(); } catch (\Error $e) { // Handle exception } 1 2 3 4 5 6 7 8 9 10

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function hello($whom) { echo "Hello $whom"; } try { hello(); } catch (\Error $e) { // Handle exception } TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 7 8 9 10

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function hello($whom) { echo "Hello $whom"; } try { hello(); } catch (\Error $e) { // Handle exception } TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 7 8 9 10

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function hello($whom, $when) { echo "Hello $whom, have a good $when"; } try { $args = ['World']; hello(... $args); } catch (\Error $e) { // Handle exception } TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 7 8 9 10 11

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function hello($whom, $when) { echo "Hello $whom, have a good $when"; } try { $args = ['World']; hello(... $args); } catch (\Error $e) { // Handle exception } TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 7 8 9 10 11

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function hello($whom, $when) { echo "Hello $whom, have a good $when"; } try { $args = ['World']; hello(... $args); } catch (\Error $e) { // Handle exception } TO O F E W A R G U M E N TS E XC E PT I O N 1 2 3 4 5 6 7 8 9 10 11

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N E G AT I V E ST R I N G O F FS E TS

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N E G AT I V E ST R I N G O F FS E TS • Consistently support negative string offsets • Similar to substr() • In string character accessors • Internal functions

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N E G AT I V E ST R I N G O F FS E TS $path = "/path/to/somewhere/"; if (substr($path, -1) !== '/') { $path = substr($path, 0, -1); }

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N E G AT I V E ST R I N G O F FS E TS $path = "/path/to/somewhere/"; if (substr($path, -1) !== '/') { $path = substr($path, 0, -1); }

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N E G AT I V E ST R I N G O F FS E TS $path = "/path/to/somewhere/"; if ($path[-1] === '/') { $path = substr($path, 0, -1); }

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N E G AT I V E ST R I N G O F FS E TS $path = "/path/to/somewhere/"; if ($path{-1} === '/') { $path = substr($path, 0, -1); }

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S E T C H A R A CT E RS $string = "abc"; $string[-2] = "z"; // $string == "azc"

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C H E C K L E N GT H if (strlen($_POST['password']) < 8) { // Do something } if (!isset($_POST['password'][7])) { // Do something } if (!isset($_POST['password'][-8])) { // Do something }

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if (strlen($_POST['password']) < 8) { // Do something } if (!isset($_POST['password'][7])) { // Do something } if (!isset($_POST['password'][-8])) { // Do something } C H E C K L E N GT H

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if (strlen($_POST['password']) < 8) { // Do something } if (!isset($_POST['password'][7])) { // Do something } if (!isset($_POST['password'][-8])) { // Do something } C H E C K L E N GT H

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F U N CT I O N S U P P O RT strpos() stripos() substr_count() grapheme_strpos() grapheme_stripos() grapheme_extract() iconv_strpos() file_get_contents() mb_strimwidth() mb_ereg_search_setpos() mb_strpos() mb_stripos()

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C LO S U R E F R O M C A L L A B L E

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C LO S U R E F R O M C A L L A B L E class Closure { public static function fromCallable(callable $callable): Closure
 {
 ...
 }
 }

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C LO S I N G OV E R S CO P E

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E Fatal error: Uncaught Error: Call to private method Validator::emailValidation() from context '' in :

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } public function emailValidation($userData) {...} public function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } public function emailValidation($userData) {...} public function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return [$this, 'emailValidation']; } return [$this, 'genericValidation']; } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return Closure::fromCallable([$this, 'emailValidation']); } return Closure::fromCallable([$this, 'genericValidation']); } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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C LO S I N G O V E R S CO P E class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return Closure::fromCallable([$this, 'emailValidation']); } return Closure::fromCallable([$this, 'genericValidation']); } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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B E T T E R E R R O R H A N D L I N G

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B E T T E R E R R O R H A N D L I N G class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return Closure::fromCallable([$this, 'emailValidation']); } return Closure::fromCallable([$this, 'genericValidation']); } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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B E T T E R E R R O R H A N D L I N G class Validator { public function getValidatorCallback($validationType) { if ($validationType == 'email') { return Closure::fromCallable([$this, 'emailValdation']); } return Closure::fromCallable([$this, 'genericValidation']); } private function emailValidation($userData) {...} private function genericValidation($userData) {...} } $validator = new Validator(); $callback = $validator->getValidatorCallback('email'); $callback($userData);

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B E T T E R E R R O R H A N D L I N G TypeError: Failed to create closure from callable: class 'Validator' does not have a method 'emailValdation' in :

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B E T T E R E R R O R H A N D L I N G TypeError: Failed to create closure from callable: function 'foo' not found or invalid function name in :

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C L A SS CO N STA N T V I S I B I L I TY

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { const MY_CONSTANT = 0; const MY_OTHER_CONSTANT = 1; const MY_FAVORITE_CONSTANT = 2; const FOO = 1, BAR = 2; }

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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C L A SS CO N STA N T V I S I B I L I TY class MyClass { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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I N T E R FA C E CO N STA N T V I S I B I L I TY interface MyInterface { public const MY_CONSTANT = 0; protected const MY_OTHER_CONSTANT = 1; private const MY_FAVORITE_CONSTANT = 2; private const FOO = 1, BAR = 2; }

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E N H A N C E M E N TS TO R E F L E CT I O N • Added ReflectionClass->getReflectionConstant() • Added ReflectionClass->getReflectionConstants() • Both return ReflectionClassConstant instances

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E N H A N C E M E N TS TO R E F L E CT I O N class ReflectionClassConstant { public function getName() { } public function getValue() { } public function isPublic() { } public function isPrivate() { } public function isProtected() { } public function getModifiers() { } public function getDeclaringClass() { } public function getDocComment() { } }

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C ATC H I N G M U LT I P L E E XC E PT I O N S

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException $e) { \My\App::renderError(500); } catch (\My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException | \My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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C ATC H I N G M U LT I P L E E XC E PT I O N S try { ... } catch (\PDOException | \My\RequestException $e) { \My\App::renderError(500); } catch (\My\RequestMethodException $e) { \My\App::renderError(405); }

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L I S T ( ) I M P R OV E M E N TS

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S P E C I F Y I N G K E YS I N L I S T ( )

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long); Notice: Undefined offset: 0
 Notice: Undefined offset: 1

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long); $lat === NULL
 $long === NULL

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list($lat, $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list('lat' => $lat, 'long' => $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list('lat' => $lat, 'long' => $long) = $coords; var_dump($lat, $long);

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S P E C I F Y I N G K E YS I N L I S T ( ) $coords = [ 'lat' => '1.3521° N', 'long' => '103.8198° E' ]; list('lat' => $lat, 'long' => $long) = $coords; var_dump($lat, $long); $lat === '1.3521° N'
 $long === '103.8198° E'

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S K I P P I N G N U M E R I C K E YS

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S K I P P I N G N U M E R I C K E YS list( , $lat, $long, , , $name ) = getLocation();

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S K I P P I N G N U M E R I C K E YS list( , $lat, $long, , , $name ) = getLocation();

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S K I P P I N G N U M E R I C K E YS list( 1 => $lat, 2 => $long, 5 => $name ) = getLocation();

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S H O RT L I ST ( ) SY N TA X

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S H O RT L I ST ( ) SY N TA X list('lat' => $lat, 'long' => $long) = $coords;

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S H O RT L I ST ( ) SY N TA X ['lat' => $lat, 'long' => $long] = $coords;

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S H O RT L I ST ( ) SY N TA X : M U T UA L LY E XC LU S I V E SY N TA X // This is not allowed: list([$a, $b], [$c, $d]) = [[1, 2], [3, 4]]; // This is also not allowed: [list($a, $b), list($c, $d)] = [[1, 2], [3, 4]]; // This, however, is allowed: [[$a, $b], [$c, $d]] = [[1, 2], [3, 4]]; // This also: list(list($a, $b), list($c, $d)) = [[1, 2], [3, 4]];

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I T E R A B L E PS U E D OTY P E

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I T E R A B L E P S U E D OTY P E • Similar to callable but values you can foreach, or yield • Accepts any array, or object that implements Traversable • SPL Iterators • Generators • Can be used for return value

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I T E R A B L E P S U E D OTY P E function enumerate(iterable $args) { foreach ($args as $arg) { echo $args; } }

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I T E R A B L E P S U E D OTY P E function enumerate(iterable $args) { foreach ($args as $arg) { echo $args; } }

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I T E R A B L E P S U E D OTY P E function enumerate(iterable $args) { foreach ($args as $arg) { echo $args; } }

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I T E R A B L E P S U E D OTY P E : R E T U R N TY P E function compactor(... $args): iterable { return $args; }

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I T E R A B L E P S U E D OTY P E : R E T U R N TY P E function compactor(... $args): iterable { return $args; }

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I T E R A B L E P S U E D OTY P E : R E T U R N TY P E function compactor(... $args): iterable { return $args; }

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I T E R A B L E P S U E D OTY P E : G E N E R ATO RS function compactor(... $args): iterable { foreach ($args as $arg) { yield $arg; } }

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A D D S I S _ I T E R A B L E ( ) F U N CT I O N // true is_iterable([1, 2, 3]); is_iterable(new ArrayIterator([1, 2, 3])); is_iterable((function () { yield 1; })()); // false is_iterable(1); is_iterable("Hello World"); is_iterable(new stdClass());

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V O I D R E T U R N TY P E

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V O I D R E T U R N TY P E • PHP functions implicitly return null • There is a semantic difference between returning null, and returning nothing (or not returning) • Void enforces this behavior • Can only be used as a return type • Cannot be changed in sub-classes

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function return_nothing(): void {
 return null;
 } V O I D R E T U R N TY P E

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function return_nothing(): void {
 return null;
 } V O I D R E T U R N TY P E

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function return_nothing(): void {
 return null;
 } V O I D R E T U R N TY P E

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function return_nothing(): void {
 return null;
 } V O I D R E T U R N TY P E

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V O I D R E T U R N TY P E function return_nothing(): void {
 return null;
 } Fatal error: A void function must not return a value (did you mean "return;" instead of "return null;"?)

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V O I D R E T U R N TY P E function return_nothing(): void {
 return "nothing";
 } Fatal error: A void function must not return a value

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V O I D R E T U R N TY P E function return_nothing(): void {
 return;
 } // or function return_nothing(): void { // no return
 }

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N U L L A B L E TY P E S

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N U L L A B L E TY P E S • Allow specified type, or null • Requires an explicit null, doesn’t default to null • Works for Arguments & Return Types • Prefix type with a ? (question mark)

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function hello(string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); N U L L A B L E TY P E S

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function hello(string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); N U L L A B L E TY P E S

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function hello(string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); N U L L A B L E TY P E S

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function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); N U L L A B L E TY P E S

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function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); N U L L A B L E TY P E S

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N U L L A B L E TY P E S function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(); Fatal error: Uncaught Error: Too few arguments to function hello(), 0 passed in on line 6 and exactly 1 expected in :2

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N U L L A B L E TY P E S function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello();

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N U L L A B L E TY P E S function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(null);

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N U L L A B L E TY P E S function hello(?string $whom)
 {
 echo "Hello " . ($whom ?? "World");
 } hello(null);

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N U L L A B L E TY P E S function hello(?string $whom
 {
 echo "Hello " . ($whom ?? "World");
 } hello( ) ); null

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N U L L A B L E TY P E S function hello(?string $whom
 {
 echo "Hello " . ($whom ?? "World");
 } hello( = null) );

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N U L L A B L E R E T U R N TY P E S

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N U L L A B L E TY P E S function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello("World"); // Hello World

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N U L L A B L E TY P E S function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello("World"); // Hello World

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function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello("World"); // Hello World N U L L A B L E TY P E S

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function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello("World"); // Hello World N U L L A B L E TY P E S

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N U L L A B L E TY P E S function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello(null);

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N U L L A B L E TY P E S TypeError: Return value of hello() must be of the type string, none returned

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N U L L A B L E TY P E S function hello(?string $whom): string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello(null);

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N U L L A B L E TY P E S function hello(?string $whom): ?string
 { if ($whom !== null) {
 return "Hello $whom"; } } echo hello(null);

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N U L L A B L E TY P E S TypeError: Return value of hello() must be of the type string, none returned

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N U L L A B L E TY P E S function hello(?string $whom): ?string
 { if ($whom !== null) {
 return "Hello $whom"; }
 return; } echo hello(null);

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N U L L A B L E TY P E S Fatal error: A function with return type must return a value (did you mean "return null;" instead of "return;"?)

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N U L L A B L E TY P E S function hello(?string $whom): ?string
 { if ($whom !== null) {
 return "Hello $whom"; }
 return } echo hello(null); ;

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N U L L A B L E TY P E S function hello(?string $whom): ?string
 { if ($whom !== null) {
 return "Hello $whom"; }
 return } echo hello(null); null;

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N U L L A B L E TY P E S function hello(?string $whom): ?string
 { if ($whom !== null) {
 return "Hello $whom"; }
 return } echo hello(null); null; // null

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CU R R E N T: P H P 7 . 1 . 0 B E TA 3

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G O T E ST !

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B E YO N D P H P 7 . 1

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CU R R E N T LY 2 6 R FCS ( A N D O N E F O R P H P 8 . 0 ! )

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W E W A N T YO U ! Credit: NASA

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6 0 % + M A R K E T S H A R E

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H U G E P E R FO R M A N C E W I N S

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M U LT I P L E X I N G CC-BY: vadikunc

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S E R V E R P US H CC-BY: Steven Depolo

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N E W A R C H I T E CT U R E & T E C H N I Q U E S

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A SY N C H R O N O US / PA R A L L E L

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W E A R E A CO M M U N I TY

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I N S U M M A R Y

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M I D - N O V E M B E R 2 0 1 6

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T H E F U T U R E I S A W E S O M E ! CC-BY-SA: Steven Gerner

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M AY B E Y O U ? R E L E A S E M A N A G E R

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T H A N K YO U ! Twitter: Email: Slides: @dshafik dshafik@akamai.com http://daveyshafik.com/slides