{"id":7350,"date":"2016-01-04T14:08:36","date_gmt":"2016-01-04T13:08:36","guid":{"rendered":"https:\/\/www.websupport.sk\/blog\/?p=7350"},"modified":"2025-03-11T21:06:39","modified_gmt":"2025-03-11T20:06:39","slug":"spustili-sme-vyrazne-rychlejsie-php-7","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2016\/01\/spustili-sme-vyrazne-rychlejsie-php-7\/","title":{"rendered":"Spustili sme v\u00fdrazne r\u00fdchlej\u0161ie PHP 7"},"content":{"rendered":"Doba \u010d\u00edtania:<\/b><\/span> 5<\/span> min.<\/span><\/span>

Len ned\u00e1vno\u00a0sa na webe objavila nov\u00e1, superr\u00fdchla verzia skriptovacieho jazyka PHP 7. Sp\u00f4sobila slu\u0161n\u00fd rozruch. Novinka zarezonovala na f\u00f3rach, soci\u00e1lnych sie\u0165ach a v odbornej komunite. N\u00e1m sa podarilo nasadi\u0165 ju u\u017e na druh\u00fd de\u0148 po ofici\u00e1lnom uveden\u00ed. Okrem toho sa n\u00e1m podarilo prispie\u0165 k ofici\u00e1lnemu release-u vlastn\u00fdm modulom, ktor\u00fd bol zaraden\u00fd do podporovan\u00fdch roz\u0161\u00edren\u00ed.<\/p>\n

\u010co sa stalo s PHP 6?<\/h2>\n

Zasveten\u00ed si iste v\u0161imli, \u017ee sa v\u00fdvoj\u00e1ri rozhodli presko\u010di\u0165 \u0161iestu verziu, ktor\u00e1 vlastne nikdy nevy\u0161la. U\u017e v roku 2005 sa za\u010dalo programovanie PHP 6, ktor\u00e9 nesplnilo o\u010dak\u00e1vania a skon\u010dilo ne\u00faspe\u0161ne.<\/p>\n

PHP bolo dlhodobo kritizovan\u00e9 za svoj slab\u00fd v\u00fdkon, \u010do dokazuje aj to, \u017ee Facebook bol n\u00faten\u00fd nap\u00edsa\u0165 vlastn\u00fd virtu\u00e1lny stroj pre maximaliz\u00e1ciu v\u00fdkonu PHP s n\u00e1zvom HHVM. Na z\u00e1klade hlasovania komunity developerov sa teda rozhodlo, \u017ee po ne\u00faspechu 6. verzie bude t\u00e1 nov\u00e1 uveden\u00e1 s poradov\u00fdm \u010d\u00edslom 7. Developeri prep\u00edsali v novej verzii zastaral\u00fd Zend framework na PHPNG, teda PHP Next-Generation, o ktorom tvrdia, \u017ee dok\u00e1\u017ee zv\u00fd\u0161i\u0165 v\u00fdkon str\u00e1nok a\u017e o 50%.<\/p>\n

Nov\u00e9 PHP 7 je ultrar\u00fdchle<\/h2>\n

Jedna z hlavn\u00fdch v\u00fdhod PHPNG je zr\u00fdchlenie, ktor\u00e9 efekt\u00edvne optimalizovalo spr\u00e1vu pam\u00e4te a tie\u017e pridalo JIT kompil\u00e1tor, ktor\u00fd umo\u017e\u0148uje kompilovanie k\u00f3du po\u010das behu programu. R\u00fdchlos\u0165 ovplyvnil aj fakt, \u017ee mnoh\u00e9 zastaral\u00e9 funkcionality boli \u00faplne odstr\u00e1nen\u00e9. T\u00edm, ktor\u00fd pracoval na v\u00fdvoji PHPNG, zverejnil tento graf. V\u0161imnite si, ako sa zr\u00fdchlili popul\u00e1rne PHP frameworky s pr\u00edchodom PHP 7.<\/p>\n

\"Sni\u0301mka01\"<\/p>\n

\"Sni\u0301mka02\"<\/p>\n

\"Sni\u0301mka03\"<\/p>\n

Aby sme sa nespoliehali len na extern\u00e9 merania, rozhodli sme sa overi\u0165 si to v praxi.<\/p>\n

\"request_distribution_php7\"<\/a><\/p>\n

Priemern\u00fd \u010das odozvy s PHP7 (zelen\u00e1 \u010diara)\u00a0<\/span>\u00a0je o cca 15% lep\u0161\u00ed ako u PHP5.6 s Opcache (pln\u00e1 modr\u00e1 \u010diara). <\/span>Testovanie prebiehalo na takmer pr\u00e1zdnom WordPresse.<\/p>\n

Nov\u00e9 kombinovan\u00e9 oper\u00e1tory<\/h2>\n

Nov\u00e1 verzia PHP nepon\u00faka len lep\u0161iu r\u00fdchlos\u0165, ale tie\u017e vylep\u0161enia pre program\u00e1torov – nov\u00e9 kombinovan\u00e9 oper\u00e1tory.<\/p>\n

<=> \u00a0kombinovan\u00fd oper\u00e1tor, ktor\u00fd v\u00e1m pom\u00f4\u017ee spreh\u013eadni\u0165 v\u00e1\u0161 k\u00f3d<\/p>\n

echo<\/span> 1<\/span> <=><\/span> 1;<\/span> \/\/ 0<\/span><\/p>\n

echo <\/span>1 <\/span><=> <\/span>2<\/span>; <\/span><\/span>\/\/ -1<\/span><\/p>\n

echo <\/span>2 <\/span><=> <\/span>1<\/span>; <\/span><\/span>\/\/ 1<\/span><\/p>\n

?? kombinovan\u00fd oper\u00e1tor, ktor\u00fd v\u00e1m pom\u00f4\u017ee skontrolova\u0165, \u010di objekt existuje a ak nie,<\/p>\n

$username <\/span>= <\/span>$_GET<\/span><\/span>[<\/span>‚user‘<\/span>] ?? <\/span><\/span>‚nobody‘<\/span>;<\/span><\/p>\n

\/\/ This is equivalent to:<\/span><\/p>\n

$username <\/span>= isset(<\/span><\/span>$_GET<\/span>[<\/span>‚user‘<\/span>]<\/span>)<\/span> ? <\/span>$_GET<\/span>[<\/span>‚user‘<\/span>] : <\/span>‚nobody‘<\/span>;<\/span><\/p>\n

Nov\u00fd typ \u201creturnu\u201d<\/h2>\n

V PHP 7 bud\u00fa m\u00f4c\u0165 program\u00e1tori definova\u0165 return typ pomocou scalarov (boolean, string, float, integer). Umo\u017en\u00ed im to p\u00edsa\u0165 menej nepredv\u00eddate\u013en\u00fd k\u00f3d a u\u013eah\u010d\u00ed h\u013eadanie ch\u00fdb (napr\u00edklad aj s pomocou Exception engine). O\u0161etrovanie chybov\u00fdch hl\u00e1sen\u00ed nebolo v\u017edy jednoduch\u00e9, no teraz n\u00e1m jazyk pon\u00faka jednoduch\u0161iu pr\u00e1cu, ktor\u00e1 umo\u017en\u00ed program\u00e1torom zachyti\u0165 v\u0161etky fat\u00e1lne chyby a ich spracovanie hne\u010f, ako sa vyskytn\u00fa.<\/p>\n

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\u010eakujeme, \u017ee sledujete n\u00e1\u0161 nov\u00fd technologick\u00fd kan\u00e1l @websupport_tech<\/a><\/p>\n

\u2014 WebSupport Tech (@websupport_tech) 2. kv\u011btna 2016<\/a><\/p><\/blockquote>\n