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似たもの同士のPerlとPHP
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uzulla
November 29, 2024
Programming
1
250
似たもの同士のPerlとPHP
2024-11-30
紅白ぺぱ合戦 : ぺぱBaanGaai LT
https://connpass.com/event/329428/
uzulla
November 29, 2024
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Transcript
ࣅͨͷಉ࢜ͷ 1FSMͱ1)1 w ߚനͺ߹ઓͺ#BBO(BBJ-5 w IUUQTDPOOQBTTDPNFWFOU
ࣗݾհ w 1FSM.POHFSʹ1)1ͷਓɺ1)1ͷਓʹ1FSMͷਓͱ ͍ΘΕΔίϞϦͷV[VMMBͰ͢ w )BDIJPKJQNͱ͍͏QN 1FSM.POHFSͷ.FFUVQ Λओ࠵͍ͯ͠·͢ w ͱ͍͑ɺ࠷ۙΊ͖ͬΓ1FSMͷਓͱࢥΘΕͳ
͘ͳΓ·ͨ͠Ͷʜ w ͜ͷͰإ͕͍ํ Β͍͠ ͳͷͰɺനࠇ͔ͭ ͳ͍άϨʔκʔϯύʔιϯͱͯ͜͜͠ʹ͍ΔͬΆ ͍Ͱ͢
ͱ͍͏͜ͱͰʜ w 1FSMͱ1)1ͰΑ͘ࣅͯΔͷͱ͍͑ʜ
None
w ʮΈΜͳ͖ͩΖʯʮͦ͏͔ʁʁʯ w ʮ৭͕פ৭ܥʯʮʁʁʁʯ
w ਖ਼نදݱͰ͢Ͷʂʂʂ w 1)1ͷਖ਼نදݱ1$3& 1FSM$PNQBUJCMF3FHVMBS&YQSFTTJPOT w ʮޓੑ͕͋Γͦ͏ʂʂʂʯ w ࣮ࡍͦͬ͘Γʂʂ ʁ
ʮ͑ͬʯ
ΤϯδϯࣅͯΔ͕ɺΠϯλʔϑΣʔε͕ҧ͏ w 1FSM͜ΜͳϦςϥϧ ͕͋Δ $txt = "ABC"; $txt =~ s/A/a/;
print $txt; w 1)1͜ΜͳؔΛ͏ $txt = preg_replace("/A/u", "a", "ABC"); echo $txt; w *'Ҏ֎ͦͬ͘Γʂʂʂ
Ωϟϓνϟͷྫ1)1 preg_match( '| (?P<scheme> https?) # SchemeΛΩϟϓνϟ :// # "://"
(?P<host> [^/\s]+) # ϗετ໊ΛΩϟϓνϟ |x', "https://test.com/", $matches ); $scheme = $matches['scheme']; $host = $matches['host'];
Ωϟϓνϟͷྫ1FSM $input = "https://test.com"; $input =~ m{ (?<scheme> https?) #
SchemeΛΩϟϓνϟ :// # "://" (?<host> [^/\s]+) # ϗετ໊ΛΩϟϓνϟ }x; my $scheme = $+{scheme}; # ͕݁͜͜ߏΫη͔ͳʁ my $host = $+{host};
ஔͷྫ1FSM $input =~ s/abc/ do { # ͜ͷதʹίʔυ͕ॻ͚Δ my $matched
= $&; # Ωϟϓνϟͨ͠ͷΛͱΓͩ͠ uc($matched); # ॲཧΛॻ͖ɺ࠷ޙͷධՁ͕ஔޙʹ } /ge; # ʮҎԼͰ͑͑Ζʯʮ͔ͨ͠ʹʯ(ucͱ͍͏func͕͋Γ·͢) $input =~ s/(abc)/uc($1)/ge;
ஔͷྫ1)1 preg_replace_callback("/abc/", function($matches) { return strtoupper($matches[0]); }, $input); w ศརػೳɺΠϯϥΠϯจࣈྻ࿈݁Մೳͳ&WBMةݥͳͷͰফ͑·ͨ͠
# php<=5.4 ϑϥάʹeΛ͚ͭΔͱevalͰ͖ͨ $func = "strtoupper"; preg_replace("/abc/e", $func."('\\0')", $input);
දʹͯ͠ΈΔ ಛ 1FSM 1)1 جຊࢀর a a a aʢಉ͡ʣ ໊લ͖ఆٛ
(?<name>pattern) (?P<name>pattern) ໊લ͖ࢀর \k<name> \k'name' (?P=name) Ωϟϓνϟ݁Ռ $1 $2͕ࣗಈͰએݴɻ ໊લ͖ͩͱ$+{name} Ҿʹ$matchesͳͲΛࢦఆ ͢Δͱ࿈ྻ͕એݴ͞ΕΔ ࣗಈม $_ ػೳͱͯ͠ͳ͍
ͦͬ͘ΓͰ͢Ͷʂ w ਖ਼نදݱࣗମͷه๏΄΅ҰॹͳΜΑͶɺߏจɺͷग़͠ೖΕͷํ๏͕ͪΐͬ ͱҧ͏͘Β͍ɻ `preg_replace` <=> `s///` `preg_match` <=> `m///`
w Ͳ͕͖ͬͪͰ͔͢ʁ
w 1)1FS ʮͳΜ͔ʜ1FSMͷํ͕͓͠ΌΕͩͳΝʂʯ w Ұൠ௨ա1)1FS ʮ͓͠ΌΕʜʁͨͱ͑͜͏͔ʁʯ $_ = "https://example.jp"; if
(m<https?://(?<host>[^/]+)>) { print "Host: $+{host}\n"; } w 1)1FS ʮ͓͠ΌΕʂʯ
தؒ·ͱΊ w ૬ޓͰॴॴ͋Δ ʁʁʁ w ͪΐͬͱؾΛ͚Ε૬ޓͰΘ͔Γ͋͑ͦ͏ w ͔ͩΒ1FSMͱ1)1૬ੑ͕ʜྑ͍ʂʂʂ ॾઆ͋Δ w
͔͠͠ͳ͕ΒΓݴޠ͕ҧ͑ࡉ͔͍ࠩ͋Δ w 1)1FSͱ1FSM.POHFS͕͓ޓ͍ʹ͢ΕҧΘͳ͍ͨΊʹʜ
ΫΠζ͠·͠ΐ͏ʂʂ Կ൪Ḧͩ͜͡Εʁʁʁ
2ߦͷઌ಄Ϛον Regex: m/^Second/ Input: "First line\nSecond line" Result: Ϛον͋Γ A)
Perl B) PHP C) ྆ํ
͑# 1)1 ղઆ1)1σϑΥϧτͰ֤ߦͷઌ಄ʹϚον͠·͢ɻ1FSMͰσϑΥϧτͰจࣈ ྻશମͷઌ಄ʹ͔͠Ϛον͠·ͤΜɻ1FSMͰ֤ߦͷઌ಄ʹϚονͤ͞Δʹɺmϑ ϥάʢϚϧνϥΠϯϞʔυʣ͕ඞཁͰ͢ɻ
2ෳߦϚονϯά Regex: m/.+/ Input: "hello\nworld" Result: Ϛον༗Γɺൣғ "hello\nworld" A) Perl
B) PHP C) ྆ํ
͑" 1FSM ղઆ1FSMσϑΥϧτͰυοτ ͕վߦʹϚον͠·͢ɻͭ·Γɺෳߦʹ·ͨ ͕ΔจࣈྻશମʹϚον͠·͢ɻ 1)1ͰσϑΥϧτͰυοτ վߦʹϚον͠ͳ͍ͨΊɺෳߦʹ·͕ͨΔϚ ονϯάΛߦ͏ʹsϑϥάʢ1$3&@%05"--
υοτΦʔϧϞʔυʣ͕ඞཁͰɺ ςετ͕ශऑͳίʔυͰ͜͠͠ͷόάΛݟ͔͚·͢ɻ php > preg_match_all("/.+/", "hello\nworld", $m); var_dump($m); array(1) { [0]=> array(2) { [0]=> string(5) "hello" [1]=> string(5) "world" } }
2ϩάղੳύλʔϯ Regex: m/^(\d{4}-\d{2}-\d{2}).*/ Input: 2024-01-01 Error 2024-01-02 Warning Expected: 2ߦϚον
Actual: 1ߦϚον όάͷݪҼʁ A) PerlͰ/mϑϥά͕ඞཁ B) PHPͰmϑϥάΛআ͢Δඞཁ͕͋Δ C) ೖྗͷվߦίʔυ͕ҧ͏
͑" 1FSMͰNϑϥά͕ඞཁ ղઆ1FSMͰϩάϑΝΠϧղੳΛߦ͏ࡍɺ^͕֤ߦͷઌ಄ʹϚον͢ΔΑ͏ʹ͢Δʹ mϑϥάʢϚϧνϥΠϯϞʔυʣ͕ඞཁͰ͢ɺͦ͏͠ͳ͍ͱจࣈྻͷઌ಄ʹͷΈ Ϛονͯ͠͠·͍·͢ɻ 1)1ͰσϑΥϧτͰ֤ߦͷઌ಄ʹϚον͠·͢ɻ ͕ɺͦͷ͍ͤͰվߦΛߟྀ͠ͳ͍ ͰΑ͍ͱ৴͡ࠐΜͩ ࣌ʹ^$ͷ᠘ ͠͠ɺΫ
ϦςΟΧϧͳόϦσʔγϣϯϛεʹͳΔ ͕ଟ͘ɺେͷ߹\A\z จࣈྻͷઌ ಄ͱɺऴ Λ͏͖ͩͱࢲࢥ͍·͢ ॾઆ͋Δ
26OJDPEFจࣈΫϥε Regex: m/\w+/ Input: "͜Μʹͪ" Result: No Match A) Perl
B) PHP C) ྆ํ
͑$ ྆ํ ղઆ1FSMͰ\w͕σϑΥϧτͰ"4$**จࣈʹͷΈϚον͠·͢ɻ 6OJDPEFจࣈʹϚονͤ͞Δʹɺίʔυʹͯuse utf8;ϓϥάϚΛ༻͢Δ ͷඞཁ͕͋Γ·͢ɻ 1FSM.POHFSʮࢦఆ͠ͳ͍ͱ͔͋Γ͑ͳ͍ͩΖɺഅࣛʹͯ͠Δͷ͔ʯ ࢲʮŰŘŕʯ ·ͨɺ1)1ͰจࣈྻόΠφϦͱͯ͠ѻΘΕΔͷͰɺ"/\w+/u",ͱVUGϑϥ άΛ͚ͭ·͢ɻ
1)1FSʮ͜͜ʹຊޠ͜ͳ͍͠ʯ ീԦࢠࡏॅ1)1FSʮ͍͍͔ΒVΛ͚ͭͱ͚ʯ
2େจࣈখจࣈม Regex: s/(\w+)/\U$1/g Input: "hello world" Result: "HELLO WORLD" A)
Perl B) PHP C) ྆ํ
͑" 1FSM ղઆ1FSMΈࠐΈͷ\UมΛαϙʔτ͓ͯ͠Γɺਖ਼نදݱͷஔͰେจࣈม ͕ՄೳͰ͢ɻ ਖ਼نදݱͱ͍͍ͭͭɺػೳతʹਖ਼نදݱͰͳΜͰͳ͘ɺจࣈྻॲཧͰ͢ ͕ʜ \uɺจࣈ͚ͩେจࣈʹ͢Δͱ͔Ͱ͖ͯศར IFMMP)FMMP ʜͦ͏ʜ͚ͩͲͭ ͔ͬͨ͜ͱͳ͍ͳʁ
1)1Ͱಉ༷ͷมΛߦ͏ʹpreg_replace_callbackؔΛ༻ͯ͠ίʔϧ όοΫͰstrtoupperؔΛݺͼग़͢ඞཁ͕͋Γ·͢ɻ
2ޙํࢀর Regex: m/(<([a-z]+)>.*?</\2>)/ Input: "<div>content</div>" Result: Match! A) Perl B)
PHP C) ྆ํ
͑$ ྆ํ ղઆʹΑΔޙํࢀর1FSMͱ1)1ͷ྆ํͰαϙʔτ͞Ε͍ͯ·͢ɻ ͲͪΒͷݴޠͰɺΩϟϓνϟάϧʔϓͷ൪߸Λ༻ͯ͠ޙํࢀরΛߦ͏͜ͱ͕Ͱ ͖·͢ɻ ͕͢͞ʹ͜Ε͘Β͍Ͱ͖ͳ͍ͱ͓͔͍͠Ͱ͢ΑͶɻ
2ίϝϯτߏจ Regex: /(?#͜ͷ෦ίϝϯτ)abc/x Input: "abc" Result: Match! ͜Ε ͲͪΒʁ A)
Perl B) PHP C) ྆ํ
͑$ ྆ํ ղઆ༧֎͔͠Ε·ͤΜ͕ɺ1FSMͱ1)1ͷ྆ํͰαϙʔτ͞Ε͍ͯ·͢ɻ 1FSMͷํ͕ΑΓॊೈͰ͕͢ɺ·͋ͦΜͳෳࡶͳίϝϯτͤΜΖɻͦΜͳෳࡶͳ ΒɺYϑϥά͔ͭͬͯͰίϝϯτͨ͠΄͏͕͍ٓ͠ɻ
2݅ذ Regex: m/(a)?b(?(1)c|d)/ Input: "abc" Result: Match! ͜Ε ͲͪΒʁ A)
Perl B) PHP
͑$ ྆ํ ղઆ͖݅Ϛονϯά1FSMͱ1)1ͷ྆ํͰαϙʔτ͞Ε͍ͯ·͢ɻ m/(a)?b(?(1)c|d)/ ͜ͷέʔεͩͱɺB ʹΩϟϓνϟάϧʔϓ Λ͔ͭͬͯD EͷϚον݅Λ੍ޚͯ͠ ͓ΓɺBCDɺ͋Δ͍CEʹϚον͠·͢ɻ ͕ɺ1)1FSଟͬͨ͜ͱ͕ແ͍ͱࢥ͍·͢ɻ
2ᩦཉϚονϯά Regex: m/a.*b/ Input: "a" + "x" * 1000000 +
"b" Result: ελοΫෆϝϞϦෆ ૣ͘Τϥʔʹͳͬͯ͠·͏ͷʁ A) Perl B) PHP C) ࠩͳ͍
͑# 1)1 ղઆجຊతʹ1FSMͱ1)1ͷ྆ํͰɺᩦཉϚονϯάେ͖ͳೖྗͰελοΫΦ ʔόʔϑϩʔϝϞϦ੍ݶա͕ൃੜ͢ΔՄೳੑ͕͋Γ·͢ɻ ͨͩ͠ɺ1)1ͷํ͕ૣ͘ΤϥʔʹͳΔͣͰ͢ɻ ͳͥͳΒΦʔόʔϑϩʔ͢ΔΑ͏ͳίʔυେ1)1FSͷϛεͳͷͰɺͬ͞͞ͱऴ ྃͯ͠ඃΛ࠷খݶʹ͠·͢ɻ
2όοΫτϥοΩϯά Regex: m/(a|aa|aaa|aaaa|aaaaa|aaaaaa)*/ Input: "aaaaa" ... (a͕݁ߏࢁ Result: ࣦഊ(Ϛονͤͣ) ͜Ε
ͲͪΒʁ A) ͲͪΒ͔ͱ͍͑Perl B) ͲͪΒ͔ͱ͍͑PHP
͑# ͲͪΒ͔ͱ͍͑1)1 ղઆ1)11)1FSΛ৴͍ͯ͡ͳ͍ͷͰɺ΄͔ͷϓϩηεʹ໎Λ͔͚ͳ͍Α͏ ʹɺͬ͞͞ͱ༏͘͠ڧ੍ऴྃ͠·͢ɻ όοΫτϥοΩϯάͷ੍ݶQIQJOJͰௐ͢Δ͜ͱͰ͖·͢ɻ # Α͘ղΒͳ͍͚Ͳ͜ΕΛͬͨΒͳ͓ͬͨɺফ͞ͳ͍Ͱ͍ͩ͘͞ ini_set('pcre.backtrack_limit', 99999999999); (*SKIP)(*FAIL)ͷςΫ͋Γ·͕͢ɺ1)1FS͍·ͤΜ
ʁʁʁ 1FSMόοΫτϥοΩϯά੍ݶ͕ͳ͘ɺݶք·Ͱ͕ΜΓ·͢ɻ ͭ·Γ1FSM1FSM.POHFSΛա৴͍ͯ͠ΔͷͰɺ͠͠NPE@QFSM͕མͪ·͢ ݹ
͍͔͕Ͱ͔ͨ͠ʁ w ΫΠζʹͰ͖Δఔʹɺࠩେ͖͘ͳ͍Ͱ͢ΑͶʁ w ͔͠͠ɺվߦΈ͍ͨʹ୯७ͳͰڍಈ͕ࠩ͋ΔͷͰؾΛ͚ͭͳ͖Ό͍͚·ͤΜ w 1FSM؆ܿʹॻ͚ͯύϫϑϧͰ͕͢ɺ͍֮͑ͯͳ͍ͱॻ͖ʹ͍͘ॴ͕͋Γ·͢ ͠ɺϛεΔͱ00.͠·͢ɻ w 1)1γϯϓϧͰෛՙʹϑΣΠϧηʔϑ͕͋Γ·͕͢ɺίʔυखଓ͖తͰ͢
͠ɺݶք·Ͱ͍͍ͨ࣌QIQJOJͷௐ͕ඞཁͰ͢ɻ w ͱ͍͑ࠜͬ͜ࣅ͍ͯΔͷͰɺ૬ޓͰཧղ͢Δͷ͘͠ͳ͍Ͱ͠ΐ͏ʂ ɹ͓ޓ͍͔֬Ίͳ͕Β͍͖ͬͯ·͠ΐ͏ʂ w ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ