{"id":4314,"date":"2020-10-30T22:35:57","date_gmt":"2020-10-30T21:35:57","guid":{"rendered":"https:\/\/webhosting.de\/?p=4314"},"modified":"2025-02-19T18:34:31","modified_gmt":"2025-02-19T17:34:31","slug":"php","status":"publish","type":"post","link":"https:\/\/webhosting.de\/pl\/php\/","title":{"rendered":"PHP"},"content":{"rendered":"

PHP jest skr\u00f3tem od j\u0119zyka skryptowego o nazwie Hypertext Preprocessor. Skr\u00f3t PHP przez d\u0142ugi czas oznacza\u0142 Personal Home Page Tool i tak te\u017c by\u0142 pierwotnie nazywany. Ten j\u0119zyk skryptowy lub j\u0119zyk programowania jest oparty na sk\u0142adni Perl i C. Programy te s\u0105 niezb\u0119dne do tworzenia dynamicznych stron internetowych i aplikacji internetowych. Preprocesor hipertekstowy jest swobodnie dost\u0119pny i rozpowszechniany jako darmowe oprogramowanie na licencji PHP. PHP jest niezb\u0119dny ze wzgl\u0119du na rozbudowan\u0105 obs\u0142ug\u0119 baz danych, integracj\u0119 protoko\u0142\u00f3w internetowych i dost\u0119pno\u015b\u0107 wielu bibliotek funkcyjnych. Pakiet oprogramowania mo\u017ce r\u00f3wnie\u017c zawiera\u0107 Squid.<\/p>\n

Jak by\u0142 dystrybuowany i jak dzia\u0142a PHP?<\/h3>\n

Na pocz\u0105tku 2013 roku PHP by\u0142o u\u017cywane na oko\u0142o 244 milionach stron internetowych. Pakiet oprogramowania mo\u017ce r\u00f3wnie\u017c zawiera\u0107 Squid. W 2015 roku 82% stron internetowych by\u0142o zarz\u0105dzanych przez ten j\u0119zyk programowania. Hypertext Preprocessor jest najcz\u0119\u015bciej u\u017cywanym j\u0119zykiem programowania na \u015bwiecie, poniewa\u017c jest \u0142atwy do nauczenia i nieskomplikowany. Program mo\u017ce tworzy\u0107 strony internetowe i cz\u0119sto jest ju\u017c zainstalowany przez hosty internetowe. Dzi\u0119ki systemowi PHP kody mog\u0105 dzia\u0142a\u0107 po stronie serwera. Oznacza to, \u017ce kod \u017ar\u00f3d\u0142owy nie mo\u017ce zosta\u0107 wys\u0142any do przegl\u0105darki internetowej. Kod \u017ar\u00f3d\u0142owy jest wysy\u0142any do interpretera z serwera WWW. Interpreter sprawdza kod \u017ar\u00f3d\u0142owy, a nast\u0119pnie wysy\u0142a dane wyj\u015bciowe do przegl\u0105darki. Dane wyj\u015bciowe z interpretera PHP r\u00f3wnie\u017c pojawi\u0105 si\u0119 na ko\u0144cu. Interpreter wysy\u0142a do przegl\u0105darki dokument HTML, kt\u00f3ry mo\u017ce by\u0107 generowany za pomoc\u0105 PHP z innymi plikami, takimi jak obrazy i pliki PDF. System, kt\u00f3ry wykonuje aplikacje internetowe za pomoc\u0105 pliku PHP to \"ustawienia<\/a>pilnie wymagane. System musi by\u0107 w stanie obs\u0142u\u017cy\u0107 instrukcje zawarte w pliku. Interfejs (np. ISAPI lub CGI) pomaga interpreterowi wykona\u0107 demona serwera lub inne us\u0142ugi serwera (np. Apache lub IIS). Mieszanka system\u00f3w operacyjnych, takich jak Linux, Windows i macOS, serwer WWW, taki jak Apache i PHP, nazywany jest LAMP dla systemu Linux. W przypadku systemu Windows pakiet nosi nazw\u0119 WAMP, a w przypadku systemu macOS nosi nazw\u0119 MAMP. Projekt XAMPP rozwija pakiety, kt\u00f3re neutralizuj\u0105 pakiety z Internetu. Wersje te mog\u0105 by\u0107 jednak u\u017cywane tylko w \u015brodowiskach testowych. Hypertext Preprocessor w rzeczywisto\u015bci dzia\u0142a tylko w \u015brodowisku serwera WWW, wi\u0119c PHP r\u00f3wnie\u017c podlega protoko\u0142owi HTTP. Ka\u017cda wywo\u0142ana strona PHP przyczynia si\u0119 do obci\u0105\u017cenia serwera WWW. Interpreter pracuje r\u00f3wnie\u017c z kodem \u017ar\u00f3d\u0142owym. Zwi\u0119ksza to obci\u0105\u017cenie i zmniejsza szybko\u015b\u0107 odpowiedzi. W celu poprawy szybko\u015bci odpowiedzi dost\u0119pne s\u0105 r\u00f3\u017cne pami\u0119ci podr\u0119czne kodu bajtowego. Pami\u0119ci podr\u0119czne s\u0105 udost\u0119pniane w celu tymczasowego przechowywania programu i przyspieszenia dost\u0119pu przy nast\u0119pnym wywo\u0142aniu pliku. Program PHP mo\u017ce by\u0107 u\u017cywany do pisania skrypt\u00f3w zorientowanych na wiersz polece\u0144. S\u0105 one r\u00f3wnie\u017c niezale\u017cne od element\u00f3w wewn\u0119trznych. Inny darmowy program z kodem PHP nosi nazw\u0119 Hip-Hop od 2010 roku. Zosta\u0142 on opracowany po kilku latach bada\u0144 przez Facebook<\/a> zosta\u0142 opracowany w celu zmniejszenia 40-procentowego obci\u0105\u017cenia serwer\u00f3w Facebooka.<\/p>\n

Sesje z programem PHP<\/h3>\n

Tylko zwyk\u0142e zmienne s\u0105 dost\u0119pne w \u017c\u0105daniu HTTP. I tylko zapisane pliki. W zakresie \u017c\u0105dania, po wywo\u0142aniu strony, tj. na ko\u0144cu, zmienna Dane<\/a>lub pami\u0119\u0107 r\u00f3wnie\u017c zostanie usuni\u0119ta. Je\u015bli u\u017cytkownik usunie strona internetowa<\/a> Cz\u0119sto wi\u0105\u017ce si\u0119 to z kilkoma ods\u0142onami strony. Tak zwane zmienne sesyjne (zakres sesji) s\u0105 u\u017cywane do wype\u0142niania koszyka w sklepie internetowym. PHP przechowuje dane mi\u0119dzy sesjami, co jest standardow\u0105 konfiguracj\u0105 (zakres aplikacji). S\u0105 one przechowywane na serwerze w inny spos\u00f3b, dzi\u0119ki czemu zawarto\u015b\u0107 wirtualnego koszyka nie jest tracona przy ka\u017cdym wywo\u0142aniu nowej strony.<\/p>","protected":false},"excerpt":{"rendered":"

PHP ist die Abk\u00fcrzung f\u00fcr eine Skriptsprache namens Hypertext Preprocessor. Diese Abk\u00fcrzung PHP stand lange f\u00fcr Personal Home Page Tool, diese ist urspr\u00fcnglich so gewesen. Die Skriptsprache oder auch Programmiersprache ist Syntax angelehnt an Perl und C. Diese Programme sind f\u00fcr die Erstellung von dynamischen Webseiten und Webanwendungen unverzichtbar. Der Hypertext Preprocessor ist hierbei als 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