Khoàⁿ "UTF-8"--ê goân-sí lōe-iông

{{Infobox character encoding
| name = UTF-8
| mime = 
| alias = 
| image = 
| caption = 
| standard = [http://www.unicode.org/versions/latest/ Unicode Standard]
| status = 
| classification = [[Unicode Transformation Format]], [[extended ASCII]], [[variable-width encoding|variable-length encoding]]
| encodes = [[ISO/IEC 10646]] ([[Unicode]])
| extends = [[ASCII]]
| prev = [[UTF-1]]
| next = 
}}

'''UTF-8''' pian-bé sī tsi̍t-tsióng iōng-teh tiān-tsí thong-sìn ê khó-piàn tn̂g-tōo jī-hû pian-bé. Iû Unicode piau-tsún tīng-gī, bîng-tshing guân-tsū Unicode (hi̍k-tsiá Thong-iōng pian-bé jī-hû tsi̍p (Universal Coded Character Set))) tsuán-uānn kik-sik – 8-bit.<ref>{{Cite book |title=The Unicode Standard |edition=6.0 |chapter=Chapter 2. General Structure |publisher=[[The Unicode Consortium]] |location=Mountain View, California, US |isbn=978-1-936213-01-6 |chapter-url=https://www.unicode.org/versions/Unicode6.0.0/}}</ref>

UTF-8 ē-tàng sú-iōng 1 kàu 4-ê tan-uī byte (8-bit) tāi-bé tan-guân, tuì Unicode tang-tiong êsóo-ū 1,112,064{{efn|name=code-point-count|17 [[plane (Unicode)|planes]] times 2<sup>16</sup> code points per plane, minus 2<sup>11</sup> technically-invalid [[UTF-16#U+D800 to U+DFFF|surrogates]].}} ê ū-hāu jī-hû tāi-bé tiám tsìn-hîng pian-bé. Kū-iú khah-kkē sòo-ti̍t ê tāi-bé tiám, óng-óng koh-khah pîn-huân teh tshut-hiān, sú-iōng khah-tsió ê jī-tsiat (byte) tsìn-hîng pian-bé. UTF-8 sī uī-tio̍h kah ASCII hiòng-āu kiam-iông jî-lâi siat-kè ê: Unicode ê tsiân 128-ê jī-hû kap ASCII it-tuì-it teh tuì-ìng, sú-iōng hām ASCII kū-iú sio-siâng ê 2 tsín-tsè ti̍t ê tan-ê jī-tsiat tsìn-hîng pian-bé; in-tshú ū-hāu ê ASCII bûn-pún sī ū-hāu ê UTF-8 pian-bé Unicode ma-s án-ne.

UTF-8 hông siat-kè tsò UTF-1 ê koh-khah hó ê tāi-thè phín, UTF-1 sī tsi̍t-tsióng kiàn-gī ê khó-piàn tngt-oo pian-bé, kū-iú pōo-hūn ASCII kiam-iông sìng; m̄-ku khiàm-khuat tsi̍t-kuá-á kong-lîng, pau-kuat tsū sio-tuè (tông-pōo) hām uân-tsuân ASCII kiam-iông ê jī-hû tshú-lí, pí-jû siâ-suànn. Ken Thompson hām Rob Pike tī 1992-nî 9-gue̍h thâu-pái si̍t-hiān Plan 9 tshau-tsok hē-thóng.<ref name="mgk25">{{ cite web | url = https://www.cl.cam.ac.uk/~mgk25/ucs/utf-8-history.txt | title = UTF-8 history | first = Rob | last = Pike | date = 30 April 2003 }}</ref><ref>{{cite book |chapter-url=https://www.cl.cam.ac.uk/~mgk25/ucs/UTF-8-Plan9-paper.pdf |chapter=Hello World or Καλημέρα κόσμε or こんにちは 世界 |title=Proceedings of the Winter 1993 USENIX Conference |first1=Rob |last1=Pike |first2=Ken |last2=Thompson |year=1993}}</ref> Tse tō tì-sú X/Open tshái-iōng UTF-8 tsok-uî FSS-UTF ê kui-huān,<ref>{{cite web|url=https://www.unicode.org/L2/Historical/wg20-n193-fss-utf.pdf|title=File System Safe UCS - Transformation Format (FSS-UTF) - X/Open Preliminary Specification|website=unicode.org}}</ref> tī 1993-nî 1-gue̍h thâu-pái teh USENIX<ref>{{cite web|url=https://www.usenix.org/legacy/publications/library/proceedings/sd93/| title=USENIX Winter 1993 Conference Proceedings|website=usenix.org}}</ref> tíng-kuân tsìng-sik the̍h-tshut, suî-āu hōo internet kang-tîng jīm-bū tsoo (IETF) teh {{nowrap|RFC 2277}} lāi-té tshái-iōng ({{nowrap|BCP 18}})<ref name="rfc2277">{{cite IETF |rfc=2277 |bcp=18 |title=IETF Policy on Character Sets and Languages |date=January 1998 |last1=Alvestrand |first1=Harald T. |author-link=Harald Alvestrand |publisher=[[Internet Engineering Task Force|IETF]]|url =}}</ref>, iōng-teh bī-lâi ê internet piau-tsún khang-khuè, í-tshù tshú-tāi kū-pán RFC tang-tiong ê tan-jī jī-tsiat (byte) jī-hû tsi̍p, pí-jû Lating-1.

Kah jīm-hô tāi-thè ê bûn-jī pian-bé sio-pí, UTF-8 tsō-sîng ê kok-tsè-huà būn-tê koh-khah tsió<ref name="Microsoft GDK">{{Cite web |title=UTF-8 support in the Microsoft Game Development Kit (GDK) - Microsoft Game Development Kit |url=https://learn.microsoft.com/en-us/gaming/gdk/_content/gc/system/overviews/utf-8 |access-date=2023-03-05 |website=learn.microsoft.com |language=en-us |quote=By operating in UTF-8, you can ensure maximum compatibility [..] Windows operates natively in UTF-16 (or WCHAR), which requires code page conversions by using MultiByteToWideChar and WideCharToMultiByte. This is a unique burden that Windows places on code that targets multiple platforms. [..] The Microsoft Game Development Kit (GDK) and Windows in general are moving forward to support UTF-8 to remove this unique burden of Windows on code targeting or interchanging with multiple platforms and the web. Also, this results in fewer internationalization issues in apps and games and reduces the test matrix that's required to get it right.}}</ref><ref name="whatwg">{{cite web |title = Encoding Standard |website = encoding.spec.whatwg.org |url = https://encoding.spec.whatwg.org/#preface |access-date = 2020-04-15 }}</ref>; pīng-tshiánn UTF-8 í-king teh sóo-iú ê hiān-tāi tshau-tsok hē-thóng (pau-kuat Microsoft Windows) kap JSON tíng-tíng ê piau-tsún tang-tiong si̍t-hiān, kî-tiong jû-lâi jû-tsē ê tsîng-hóng tō sī, UTF-8 sī uî-it ún-tsún ê Unicode hîng-sik.

Tsia̍t-tsí 2023-nî, UTF-8 sī World Wide Web (hām internet ki-su̍t) ê tsú-iàu pian-bé, tsiàm soou bāng-ia̍h ê 98.0%, tsiân 10,000 ê ia̍h-bīn ê 99.0%, tuì tsiânn-tsē gú-giân lóng kuân-kàu 100%.<ref name="W3TechsWebEncoding">{{Cite web|url=https://w3techs.com/technologies/cross/character_encoding/ranking|title=Usage Survey of Character Encodings broken down by Ranking|website=W3Techs|language=en|access-date=2023-10-01}}</ref> Tsha-put-to sóo-ū ê kok-ka hām gú-giân teh bāng-lōo tíng-kuân lóng-ū 95% hi̍k-tsiá í-siōng lóng teh sú-iōng UTF-8 pian-bé.

==Tsù-sik==
{{notelist}}

==Tsù-kái==
{{reflist|2}}

==Tsham-ua̍t==
*The Unicode Consortium

==Guā-pōo liân-kiat==
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* [http://doc.cat-v.org/plan_9/4th_edition/papers/utf Original UTF-8 paper] ([https://web.archive.org/web/20000917055036/http://plan9.bell-labs.com/sys/doc/utf.pdf or pdf]) for [[Plan 9 from Bell Labs]]
* [https://www.cl.cam.ac.uk/~mgk25/ucs/utf-8-history.txt History of UTF-8 by Rob Pike]
* UTF-8 test pages:
** [http://www.user.uni-hannover.de/nhtcapri/multilingual1.html Andreas Prilop] {{Webarchive|url=https://web.archive.org/web/20171130213601/http://www.user.uni-hannover.de/nhtcapri/multilingual1.html |date=2017-11-30 }}
** [http://titus.uni-frankfurt.de/indexe.htm?/unicode/unitest.htm Jost Gippert]
** [http://www.w3.org/2001/06/utf-8-test/UTF-8-demo.html World Wide Web Consortium]
* Unix/Linux: [http://www.cl.cam.ac.uk/~mgk25/unicode.html UTF-8/Unicode FAQ], [http://www.tldp.org/HOWTO/Unicode-HOWTO.html Linux Unicode HOWTO], [https://wiki.gentoo.org/wiki/UTF-8 UTF-8 and Gentoo]
* {{YouTube|id=MijmeoH9LT4|title=Characters, Symbols and the Unicode Miracle}}
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[[Lūi-pia̍t:Jī-hû pian-bé]]
[[Category:Computer-related introductions in 1993]]
[[Lūi-pia̍t:Pian-bé]]
[[Category:Unicode Transformation Formats]]