1NKF(3) User Contributed Perl Documentation NKF(3)
2
6 NKF - Perl extension for Network Kanji Filter
7
9 use NKF;
10 $output = nkf("-s",$input);
11
13 This is a Perl Extension version of nkf (Network Kanji Filter). It
14 converts the last argument and return converted result. Conversion
15 details are specified by flags before the last argument. Nkf is a yet
16 another kanji code converter among networks, hosts and terminals. It
17 converts input kanji code to designated kanji code such as ISO-2022-JP,
18 Shift_JIS, EUC-JP, UTF-8, UTF-16 or UTF-32.
19 One of the most unique faculty of nkf is the guess of the input kanji
21 encodings. It currently recognizes ISO-2022-JP, Shift_JIS, EUC-JP,
22 UTF-8, UTF-16 and UTF-32. So users needn't set the input kanji code
23 explicitly.
24 By default, X0201 kana is converted into X0208 kana. For X0201 kana,
26 SO/SI, SSO and ESC-(-I methods are supported. For automatic code
27 detection, nkf assumes no X0201 kana in Shift_JIS. To accept X0201 in
28 Shift_JIS, use -X, -x or -S.
29 multiple options are specifed as seprate strings, such as
31 print nkf('--ic=UTF8-MAC', '-w', $string), "\n";
33 except the last arguments.
35
37 -J -S -E -W -W16 -W32 -j -s -e -w -w16 -w32
38 Specify input and output encodings. Upper case is input. cf. --ic
39 and --oc.
40 -J ISO-2022-JP (JIS code).
42 -S Shift_JIS and JIS X 0201 kana. EUC-JP is recognized as X0201
44 kana. Without -x flag, JIS X 0201 Katakana (a.k.a.halfwidth
45 kana) is converted into JIS X 0208. If you use Windows, see
46 Windows-31J (CP932).
47 -E EUC-JP.
49 -W UTF-8N.
51 -W16[BL][0]
53 UTF-16. B or L gives whether Big Endian or Little Endian. 0
54 gives whther put BOM or not.
55 -W32[BL][0]
57 UTF-32. B or L gives whether Big Endian or Little Endian. 0
58 gives whther put BOM or not.
59 -b -u
61 Output is buffered (DEFAULT), Output is unbuffered.
62 -t No conversion.
64 -i[@B]
66 Specify the escape sequence for JIS X 0208.
67 -i@ Use ESC ( @. (JIS X 0208-1978)
69 -iB Use ESC ( B. (JIS X 0208-1983/1990 DEFAULT)
71 -o[BJ]
73 Specify the escape sequence for US-ASCII/JIS X 0201 Roman. (DEFAULT
74 B)
75 -r {de/en}crypt ROT13/47
77 -h[123] --hiragana --katakana --katakana-hiragana
79 -h1 --hiragana
80 Katakana to Hiragana conversion.
81 -h2 --katakana
83 Hiragana to Katakana conversion.
84 -h3 --katakana-hiragana
86 Katakana to Hiragana and Hiragana to Katakana conversion.
87 -T Text mode output (MS-DOS)
89 -f[m [- n]]
91 Folding on m length with n margin in a line. Without this option,
92 fold length is 60 and fold margin is 10.
93 -F New line preserving line folding.
95 -Z[0-3]
97 Convert X0208 alphabet (Fullwidth Alphabets) to ASCII.
98 -Z -Z0
100 Convert X0208 alphabet to ASCII.
101 -Z1 Convert X0208 kankaku to single ASCII space.
103 -Z2 Convert X0208 kankaku to double ASCII spaces.
105 -Z3 Replacing fullwidth >, <, ", & into '>', '<', '"',
107 '&' as in HTML.
108 -X -x
110 With -X or without this option, X0201 is converted into X0208 Kana.
111 With -x, try to preserve X0208 kana and do not convert X0201 kana
112 to X0208. In JIS output, ESC-(-I is used. In EUC output, SS2 is
113 used.
114 -B[0-2]
116 Assume broken JIS-Kanji input, which lost ESC. Useful when your
117 site is using old B-News Nihongo patch.
118 -B1 allows any chars after ESC-( or ESC-$.
120 -B2 force ASCII after NL.
122 -I Replacing non iso-2022-jp char into a geta character (substitute
124 character in Japanese).
125 -m[BQN0]
127 MIME ISO-2022-JP/ISO8859-1 decode. (DEFAULT) To see ISO8859-1
128 (Latin-1) -l is necessary.
129 -mB Decode MIME base64 encoded stream. Remove header or other part
131 before conversion.
132 -mQ Decode MIME quoted stream. '_' in quoted stream is converted to
134 space.
135 -mN Non-strict decoding. It allows line break in the middle of the
137 base64 encoding.
138 -m0 No MIME decode.
140 -M MIME encode. Header style. All ASCII code and control characters
142 are intact.
143 -MB MIME encode Base64 stream. Kanji conversion is performed
145 before encoding, so this cannot be used as a picture encoder.
146 -MQ Perform quoted encoding.
148 -l Input and output code is ISO8859-1 (Latin-1) and ISO-2022-JP. -s,
150 -e and -x are not compatible with this option.
151 -L[uwm] -d -c
153 Convert line breaks.
154 -Lu -d
156 unix (LF)
157 -Lw -c
159 windows (CRLF)
160 -Lm mac (CR)
162 Without this option, nkf doesn't convert line breaks.
164 --fj --unix --mac --msdos --windows
166 Convert for these systems.
167 --jis --euc --sjis --mime --base64
169 Convert to named code.
170 --jis-input --euc-input --sjis-input --mime-input --base64-input
172 Assume input system
173 --ic=input codeset --oc=output codeset
175 Set the input or output codeset. NKF supports following codesets
176 and those codeset names are case insensitive.
177 ISO-2022-JP
179 a.k.a. RFC1468, 7bit JIS, JUNET
180 EUC-JP (eucJP-nkf)
182 a.k.a. AT&T JIS, Japanese EUC, UJIS
183 eucJP-ascii
185 eucJP-ms
186 CP51932
187 Microsoft Version of EUC-JP.
188 Shift_JIS
190 a.k.a. SJIS, MS_Kanji
191 Windows-31J
193 a.k.a. CP932
194 UTF-8
196 same as UTF-8N
197 UTF-8N
199 UTF-8 without BOM
200 UTF-8-BOM
202 UTF-8 with BOM
203 UTF8-MAC (input only)
205 decomposed UTF-8
206 UTF-16
208 same as UTF-16BE
209 UTF-16BE
211 UTF-16 Big Endian without BOM
212 UTF-16BE-BOM
214 UTF-16 Big Endian with BOM
215 UTF-16LE
217 UTF-16 Little Endian without BOM
218 UTF-16LE-BOM
220 UTF-16 Little Endian with BOM
221 UTF-32
223 same as UTF-32BE
224 UTF-32BE
226 UTF-32 Big Endian without BOM
227 UTF-32BE-BOM
229 UTF-32 Big Endian with BOM
230 UTF-32LE
232 UTF-32 Little Endian without BOM
233 UTF-32LE-BOM
235 UTF-32 Little Endian with BOM
236 --fb-{skip, html, xml, perl, java, subchar}
238 Specify the way that nkf handles unassigned characters. Without
239 this option, --fb-skip is assumed.
240 --prefix=escape charactertarget character..
242 When nkf converts to Shift_JIS, nkf adds a specified escape
243 character to specified 2nd byte of Shift_JIS characters. 1st byte
244 of argument is the escape character and following bytes are target
245 characters.
246 --no-cp932ext
248 Handle the characters extended in CP932 as unassigned characters.
249 --no-best-fit-chars
251 When Unicode to Encoded byte conversion, don't convert characters
252 which is not round trip safe. When Unicode to Unicode conversion,
253 with this and -x option, nkf can be used as UTF converter. (In
254 other words, without this and -x option, nkf doesn't save some
255 characters)
256 When nkf converts strings that related to path, you should use this
258 opion.
259 --cap-input
261 Decode hex encoded characters.
262 --url-input
264 Unescape percent escaped characters.
265 --numchar-input
267 Decode character reference, such as "&#....;".
268 -- Ignore rest of -option.
270
272 Copyright (c) 1987, Fujitsu LTD. (Itaru ICHIKAWA).
273 Copyright (c) 1996-2015, The nkf Project.
275
277 perl(1). nkf(1)
278perl v5.34.0 2021-07-22 NKF(3)