{"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\/sv\/php\/","title":{"rendered":"PHP"},"content":{"rendered":"

PHP \u00e4r en f\u00f6rkortning f\u00f6r ett skriptspr\u00e5k som kallas Hypertext Preprocessor. Denna f\u00f6rkortning PHP stod l\u00e4nge f\u00f6r Personal Home Page Tool, vilket \u00e4r vad det ursprungligen var. Skriptspr\u00e5ket eller programmeringsspr\u00e5ket \u00e4r baserat p\u00e5 Perl- och C-syntax. Dessa program \u00e4r oumb\u00e4rliga f\u00f6r att skapa dynamiska webbplatser och webbapplikationer. Hypertextpreprocessorn \u00e4r fritt tillg\u00e4nglig och distribueras som fri programvara under PHP-licensen. PHP \u00e4r oumb\u00e4rligt p\u00e5 grund av sitt omfattande databasst\u00f6d, integrationen av Internetprotokoll och tillg\u00e5ngen till m\u00e5nga funktionsbibliotek. Programvarupaketet kan ocks\u00e5 inneh\u00e5lla Squid.<\/p>\n

Hur distribuerades det och hur fungerar PHP?<\/h3>\n

I b\u00f6rjan av 2013 anv\u00e4ndes PHP p\u00e5 cirka 244 miljoner webbplatser. Programvarupaketet kan ocks\u00e5 inneh\u00e5lla Squid. \u00c5r 2015 styrdes 82% av webbplatser av detta programmeringsspr\u00e5k. Hypertext Preprocessor \u00e4r det mest anv\u00e4nda programmeringsspr\u00e5ket i v\u00e4rlden eftersom det \u00e4r l\u00e4tt att l\u00e4ra sig och okomplicerat. Programmet kan skapa webbplatser och \u00e4r dessutom ofta redan installerat hos webbhotellen. Med PHP-systemet kan koderna arbeta p\u00e5 serversidan. Det inneb\u00e4r att k\u00e4llkoden inte kan skickas till en webbl\u00e4sare. K\u00e4llkoden skickas till en tolk fr\u00e5n webbservern. Tolken kontrollerar k\u00e4llkoden och skickar sedan utdata till webbl\u00e4saren. Denna utdata fr\u00e5n PHP-tolken kommer ocks\u00e5 att visas i slutet. Tolken skickar ett HTML-dokument till webbl\u00e4saren, som kan genereras med PHP med andra filer som bilder och PDF-filer. Systemet som exekverar webbapplikationer med en PHP-fil \u00e4r \"php-inst\u00e4llningar\"<\/a>br\u00e5dskande behov. Systemet m\u00e5ste kunna hantera de instruktioner som finns i filen. Ett gr\u00e4nssnitt (t.ex. ISAPI eller CGI) hj\u00e4lper tolken att k\u00f6ra en serverdaemon eller andra servertj\u00e4nster (t.ex. Apache eller IIS). En blandning av operativsystem som Linux, Windows och macOS, en webbserver som Apache och PHP kallas LAMP f\u00f6r Linux. F\u00f6r Windows heter paketet WAMP och f\u00f6r macOS heter det MAMP. XAMPP-projektet utvecklar paket som neutraliserar paket fr\u00e5n Internet. Dessa versioner kan dock endast anv\u00e4ndas f\u00f6r testmilj\u00f6er. Hypertext Preprocessor k\u00f6rs egentligen bara i en webbservermilj\u00f6, s\u00e5 PHP \u00e4r ocks\u00e5 underst\u00e4llt HTTP. Varje PHP-sida som anropas bidrar till belastningen p\u00e5 webbservern. Tolken arbetar ocks\u00e5 med k\u00e4llkoden. Detta \u00f6kar belastningen och minskar svarshastigheten. Olika bytecode-cacher tillhandah\u00e5lls f\u00f6r att f\u00f6rb\u00e4ttra svarshastigheten. Cacherna \u00e4r till f\u00f6r att tillf\u00e4lligt lagra programmet och snabba upp \u00e5tkomsten n\u00e4sta g\u00e5ng filen anropas. Med PHP-programmet kan man skriva skript som \u00e4r kommandoradsorienterade. Dessa \u00e4r ocks\u00e5 oberoende av de interna funktionerna. En annan fri programvara med PHP-koden heter Hip-Hop och har funnits sedan 2010. Den utvecklades efter flera \u00e5rs forskning av Facebook<\/a> utvecklades f\u00f6r att minska den 40-procentiga serverbelastningen p\u00e5 Facebook.<\/p>\n

Sessioner med PHP-programmet<\/h3>\n

Endast vanliga variabler \u00e4r tillg\u00e4ngliga inom en HTTP-beg\u00e4ran. Och endast sparade filer. I request-scopet, efter sidf\u00f6rfr\u00e5gan, dvs. i slutet, \u00e4r Uppgifter<\/a>eller minnet raderas ocks\u00e5. Om en anv\u00e4ndare raderar ett Webbplats<\/a> Detta inneb\u00e4r ofta flera sidvisningar. S\u00e5 kallade sessionsvariabler (session scope) anv\u00e4nds f\u00f6r att fylla en kundvagn i en webbutik. PHP lagrar data \u00f6ver sessioner, vilket \u00e4r en standardkonfiguration (application scope). Dessa lagras p\u00e5 servern p\u00e5 andra s\u00e4tt s\u00e5 att inneh\u00e5llet i den virtuella varukorgen inte g\u00e5r f\u00f6rlorat vid varje ny sidvisning.<\/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 […]<\/p>\n","protected":false},"author":1,"featured_media":619,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","inline_featured_image":false,"footnotes":""},"categories":[732],"tags":[212],"class_list":["post-4314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lexikon","tag-php"],"acf":[],"_wp_attached_file":null,"_wp_attachment_metadata":null,"litespeed-optimize-size":null,"litespeed-optimize-set":null,"_elementor_source_image_hash":null,"_wp_attachment_image_alt":null,"stockpack_author_name":null,"stockpack_author_url":null,"stockpack_provider":null,"stockpack_image_url":null,"stockpack_license":null,"stockpack_license_url":null,"stockpack_modification":null,"color":null,"original_id":null,"original_url":null,"original_link":null,"unsplash_location":null,"unsplash_sponsor":null,"unsplash_exif":null,"unsplash_attachment_metadata":null,"_elementor_is_screenshot":null,"surfer_file_name":null,"surfer_file_original_url":null,"envato_tk_source_kit":null,"envato_tk_source_index":null,"envato_tk_manifest":null,"envato_tk_folder_name":null,"envato_tk_builder":null,"envato_elements_download_event":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_trp_menu_languages":null,"rank_math_primary_category":"0","rank_math_title":null,"inline_featured_image":null,"_yoast_wpseo_primary_category":null,"rank_math_schema_blogposting":null,"rank_math_schema_videoobject":null,"_oembed_049c719bc4a9f89deaead66a7da9fddc":null,"_oembed_time_049c719bc4a9f89deaead66a7da9fddc":null,"_yoast_wpseo_focuskw":"","_yoast_wpseo_linkdex":null,"_oembed_27e3473bf8bec795fbeb3a9d38489348":null,"_oembed_c3b0f6959478faf92a1f343d8f96b19e":null,"_trp_translated_slug_en_us":null,"_wp_desired_post_slug":null,"_yoast_wpseo_title":null,"tldname":null,"tldpreis":null,"tldrubrik":null,"tldpolicylink":null,"tldsize":null,"tldregistrierungsdauer":null,"tldtransfer":null,"tldwhoisprivacy":null,"tldregistrarchange":null,"tldregistrantchange":null,"tldwhoisupdate":null,"tldnameserverupdate":null,"tlddeletesofort":null,"tlddeleteexpire":null,"tldumlaute":null,"tldrestore":null,"tldsubcategory":null,"tldbildname":null,"tldbildurl":null,"tldclean":null,"tldcategory":null,"tldpolicy":null,"tldbesonderheiten":null,"tld_bedeutung":null,"_oembed_d167040d816d8f94c072940c8009f5f8":null,"_oembed_b0a0fa59ef14f8870da2c63f2027d064":null,"_oembed_4792fa4dfb2a8f09ab950a73b7f313ba":null,"_oembed_33ceb1fe54a8ab775d9410abf699878d":null,"_oembed_fd7014d14d919b45ec004937c0db9335":null,"_oembed_21a029d076783ec3e8042698c351bd7e":null,"_oembed_be5ea8a0c7b18e658f08cc571a909452":null,"_oembed_a9ca7a298b19f9b48ec5914e010294d2":null,"_oembed_f8db6b27d08a2bb1f920e7647808899a":null,"_oembed_168ebde5096e77d8a89326519af9e022":null,"_oembed_cdb76f1b345b42743edfe25481b6f98f":null,"_oembed_87b0613611ae54e86e8864265404b0a1":null,"_oembed_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_oembed_time_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_tldname":null,"_tldclean":null,"_tldpreis":null,"_tldcategory":null,"_tldsubcategory":null,"_tldpolicy":null,"_tldpolicylink":null,"_tldsize":null,"_tldregistrierungsdauer":null,"_tldtransfer":null,"_tldwhoisprivacy":null,"_tldregistrarchange":null,"_tldregistrantchange":null,"_tldwhoisupdate":null,"_tldnameserverupdate":null,"_tlddeletesofort":null,"_tlddeleteexpire":null,"_tldumlaute":null,"_tldrestore":null,"_tldbildname":null,"_tldbildurl":null,"_tld_bedeutung":null,"_tldbesonderheiten":null,"_oembed_ad96e4112edb9f8ffa35731d4098bc6b":null,"_oembed_8357e2b8a2575c74ed5978f262a10126":null,"_oembed_3d5fea5103dd0d22ec5d6a33eff7f863":null,"_eael_widget_elements":null,"_oembed_0d8a206f09633e3d62b95a15a4dd0487":null,"_oembed_time_0d8a206f09633e3d62b95a15a4dd0487":null,"_aioseo_description":null,"_eb_attr":null,"_eb_data_table":null,"_oembed_819a879e7da16dd629cfd15a97334c8a":null,"_oembed_time_819a879e7da16dd629cfd15a97334c8a":null,"_acf_changed":null,"_wpcode_auto_insert":null,"_edit_last":"1","_edit_lock":"1739986347:1","_oembed_e7b913c6c84084ed9702cb4feb012ddd":null,"_oembed_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_time_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_03514b67990db061d7c4672de26dc514":null,"_oembed_time_03514b67990db061d7c4672de26dc514":null,"rank_math_news_sitemap_robots":"index","rank_math_robots":["index"],"_eael_post_view_count":"10513","_trp_automatically_translated_slug_ru_ru":null,"_trp_automatically_translated_slug_et":null,"_trp_automatically_translated_slug_lv":null,"_trp_automatically_translated_slug_fr_fr":null,"_trp_automatically_translated_slug_en_us":null,"_wp_old_slug":null,"_trp_automatically_translated_slug_da_dk":null,"_trp_automatically_translated_slug_pl_pl":null,"_trp_automatically_translated_slug_es_es":null,"_trp_automatically_translated_slug_hu_hu":null,"_trp_automatically_translated_slug_fi":null,"_trp_automatically_translated_slug_ja":null,"_trp_automatically_translated_slug_lt_lt":null,"_elementor_edit_mode":null,"_elementor_template_type":null,"_elementor_version":null,"_elementor_pro_version":null,"_wp_page_template":"default","_elementor_page_settings":null,"_elementor_data":null,"_elementor_css":null,"_elementor_conditions":null,"_happyaddons_elements_cache":null,"_oembed_75446120c39305f0da0ccd147f6de9cb":null,"_oembed_time_75446120c39305f0da0ccd147f6de9cb":null,"_oembed_3efb2c3e76a18143e7207993a2a6939a":null,"_oembed_time_3efb2c3e76a18143e7207993a2a6939a":null,"_oembed_59808117857ddf57e478a31d79f76e4d":null,"_oembed_time_59808117857ddf57e478a31d79f76e4d":null,"_oembed_965c5b49aa8d22ce37dfb3bde0268600":null,"_oembed_time_965c5b49aa8d22ce37dfb3bde0268600":null,"_oembed_81002f7ee3604f645db4ebcfd1912acf":null,"_oembed_time_81002f7ee3604f645db4ebcfd1912acf":null,"_elementor_screenshot":null,"_oembed_7ea3429961cf98fa85da9747683af827":null,"_oembed_time_7ea3429961cf98fa85da9747683af827":null,"_elementor_controls_usage":null,"_elementor_page_assets":[],"_elementor_screenshot_failed":null,"theplus_transient_widgets":[],"_eael_custom_js":null,"_wp_old_date":null,"_trp_automatically_translated_slug_it_it":null,"_trp_automatically_translated_slug_pt_pt":null,"_trp_automatically_translated_slug_zh_cn":null,"_trp_automatically_translated_slug_nl_nl":null,"_trp_automatically_translated_slug_pt_br":null,"_trp_automatically_translated_slug_sv_se":null,"rank_math_analytic_object_id":"801","rank_math_internal_links_processed":null,"_trp_automatically_translated_slug_ro_ro":null,"_trp_automatically_translated_slug_sk_sk":null,"_trp_automatically_translated_slug_bg_bg":null,"_trp_automatically_translated_slug_sl_si":null,"litespeed_vpi_list":["webhostinglogo.png"],"litespeed_vpi_list_mobile":["webhostinglogo.png"],"rank_math_seo_score":"12","rank_math_contentai_score":{"keywords":"74.51","wordCount":"0","linkCount":"0","headingCount":"0","mediaCount":"0"},"ilj_limitincominglinks":"","ilj_maxincominglinks":"1","ilj_limitoutgoinglinks":"","ilj_maxoutgoinglinks":"1","ilj_limitlinksperparagraph":"","ilj_linksperparagraph":"1","ilj_blacklistdefinition":[],"ilj_linkdefinition":["php"],"_eb_reusable_block_ids":[],"rank_math_focus_keyword":null,"rank_math_og_content_image":{"check":"31180120b6f8403fc854285e1e620c10","images":[1100]},"_yoast_wpseo_metadesc":"","_yoast_wpseo_content_score":null,"_yoast_wpseo_focuskeywords":null,"_yoast_wpseo_keywordsynonyms":null,"_yoast_wpseo_estimated-reading-time-minutes":null,"rank_math_description":null,"surfer_last_post_update":null,"surfer_last_post_update_direction":null,"surfer_keywords":null,"surfer_location":null,"surfer_draft_id":null,"surfer_permalink_hash":null,"surfer_scrape_ready":null,"_thumbnail_id":"619","footnotes":null,"_links":{"self":[{"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/posts\/4314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/comments?post=4314"}],"version-history":[{"count":1,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/posts\/4314\/revisions"}],"predecessor-version":[{"id":8427,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/posts\/4314\/revisions\/8427"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/media\/619"}],"wp:attachment":[{"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/media?parent=4314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/categories?post=4314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhosting.de\/sv\/wp-json\/wp\/v2\/tags?post=4314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}