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PHPのエラーと例外再入門 / php-error-and-exception
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Hiraku NAKANO
June 10, 2017
Technology
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PHPのエラーと例外再入門 / php-error-and-exception
PHPカンファレンス福岡2017の登壇資料です。
Hiraku NAKANO
June 10, 2017
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Transcript
PHPͷ Τϥʔͱྫ֎࠶ೖ PHPΧϯϑΝϨϯεԬ 2017
ࣗݾհ • த (@Hiraku) • https://github.com/hirak • ීஈϝϧΧϦͰαʔόʔαΠυΤϯδχΞ ͬͯ·͢
• Composerؔ࿈ͷൃදΛΑ͍ͯ͘͠·͢
None
None
None
None
PHPͷ Τϥʔͱྫ֎࠶ೖ PHPΧϯϑΝϨϯεԬ 2017
ͳΜͰࠓ͞Β ʮΤϥʔͱྫ֎ʯʁ
None
ྫ֎͕Β͍͠ʂ • 2016ʙ ҰॠQiitaϒϩάͰྫ֎ͷهࣄ ͕૿͑ͨ • http://php-genba.shin1x1.com/1 • ͨͿΜݯPHPΧϯϑΝϨϯε2016Ͱͷ @t_wada
͞Μͷߨԋ
None
͔Ϳͬͨ… ʘ(^o^)ʗ
ྫ֎+PHPͷࣄ ͕ ηογϣϯͰ͢
࣍ 1. ʮΤϥʔʯͷఆٛ 2. ൃੜͱޙ࢝ͷ 3. PHPͷΤϥʔͱྫ֎ͷػೳ 4. ྫ֎҆શͱΦϒδΣΫτࢦ 5.
ϙέϞϯ
1ষ ʮΤϥʔʯͷఆٛ
ྫ: HTTPͰϑΝΠϧऔಘ͢Δؔ • $resp = http_get('http://php.net/') • ࣗલ࣮͢ΔͳΒɺͲΜͳΤϥʔॲཧΛॻ͖ ·͔͢ʁ
http_get(true); // boolean͕͞ΕͨΜͰ͚͢Ͳʂ http_get('uso800'); // URL͡Όͳ͍ʂ http_get('http://uso800.example.com/'); // !υϝΠϯݟ͔ͭΒͳ͍Α http_get('http://heavy.example.com/');
// !3࣌ؒͨͬͯऴΘΒͳ͍ΜͰ͕͢
Τϥʔͱ • Կ͔ྑ͘ͳ͍͜ͱ͕ى͖ͨ • ॲཧΛਐΊΒΕͳ͍ • ʮॲཧΛதࢭ͢Δʯ • ʮԡ͠௨͢ʯ
http_get(true); // boolean͕͞ΕͨΜͰ͚͢Ͳʂ http_get('uso800'); // URL͡Όͳ͍ʂ http_get('http://uso800.example.com/'); // !υϝΠϯݟ͔ͭΒͳ͍Α http_get('http://heavy.example.com/');
// !3࣌ؒͨͬͯऴΘΒͳ͍ΜͰ͕͢ ←ॻ͍͕ͨͭѱ͍ ʢόάʣ ←Β͍ࣄނ
୭͕ѱ͍͔ • ͍ํ͕ؒҧ͍ͬͯΔύλʔϯ • Ͳ͏ͯ͠ൃੜ͠͏Δύλʔϯ (࣮ߦ࣌Τϥʔ) • typoͳͷ͔ʁ ࣮ߦ࣌Τϥʔͳͷ͔ʁ •
͔ؔΒผͰ͖ͳ͍ύλʔϯ
None
PHPͷཱͰʮΤϥʔʯͱ • PHPࣗମ • ʮιʔείʔυΛड͚औͬͯʯ • ʮ࣮ߦ͢Δʯ • ؔΈ͍ͨͳͷ •
PHPʹͱͬͯԿ͔ྑ͘ͳ͍͜ͱ͕ى͖ͨ ʹΤϥʔ
PHPʹͱͬͯྑ͘ͳ͍͜ͱ • มͳιʔείʔυ͕͞Εͨ • ࣮ߦͯ͠ΈͨΒมͳ͜ͱ͕ى͖ͨ
php > "Hello world"Λग़ྗͯ͠Լ͍͞ɻ; PHP Parse error: syntax error, unexpected
identifier (T_STRING) in php shell code on line 1 ԿޠͩΑͦΕʂ ཧղෆೳɺॲཧࢭΊΔͶ
php > echo Hello; PHP Notice: Use of undefined constant
Hello - assumed 'Hello' in php shell code on line 1 Hello ະఆٛఆ… ͨͿΜ""ΛΕͯΔΜͩͳʂ উखʹจࣈྻѻ͍ʹͯ͠Ζ͏ ͨͩͪ͠ΐͬͱո͍͔͠Β Τϥʔͱͯ͠௨
php > echo [1,2,3]; PHP Notice: Array to string conversion
in php shell code on line 1 Array ྻΛecho… ༷ͱͯ͠"Array"ͱग़ྗ ͢Ε͍͍Μ͚ͩͲɺո͍͔͠Β Τϥʔͱͯ͠௨
PHP͞ΜେมͳͷͰ͢ • ίϯύΠϧɺͱ͍͏લॲཧ͕ͳ͍ • ͯ͢Λ࣮ߦ࣌ʹॲཧ͠ɺո͚͠Εͱʹ͔ ͘ΤϥʔΛు͘ • ଞͷݴޠͩͱlintίϯύΠϧ࣌warningʹ૬ ͢Δ෦ʮΤϥʔʯͷൣᙝʹͳΔ
PHPͷΤϥʔ৭ʑ • ߏจ͓͔͍͠ (parse error) • ܕએݴҧ • ͪΐͬͱ͋Γ͑ͳ͍҉ͷܕม •
ഇࢭ༧ఆͷؔΛ࣮ߦͨ͠ (deprecated) • ഇࢭ༧ఆͷߏจΛ͍ͬͯΔ (strict)
1ষ ·ͱΊ • PHPιʔείʔυΛͦͷͰ࣮ߦͰ͖ͳ͚ Ε͍͚ͳ͍ͷͰɺʮΤϥʔʯͷൣғ͕͍ • lintʹ͍ۙ༰ʮΤϥʔʯʹͳΔ
2ষ ൃੜͱޙ࢝ͷ
࠶ܝ: HTTPͰϑΝΠϧऔಘ͢Δؔ • $resp = http_get('http://php.net/') • ࣗલ࣮͢ΔͳΒɺͲΜͳΤϥʔॲཧΛॻ͖ ·͔͢ʁ
͠ɺhttp_getؔͷ༷͕ • ʮऔಘͰ͖ͳ͔ͬͨΒϦτϥΠ͠ଓ͚Δʯ ͩͬͨΒʁ • URLΛtypoͨ͠Β
͠ɺhttp_getؔͷ༷͕ • ʮऔಘͰ͖ͳ͔ͬͨΒۭจࣈΛฦ͢ʯ ͩͬͨΒʁ • ຊʹϨεϙϯε͕ۭจࣈͩͬͨͱ͖ͱݟ ͚͕͔ͭͳ͍
͠ɺhttp_getؔͷ༷͕ • ʮऔಘͰ͖ͳ͔ͬͨΒϩάʹهͯ͠falseΛ ฦ͢ʯͩͬͨΒʁ • ϩάͷॻ͖ࠐΈઌͬͯͲ͜Ͱઃఆ͢Δͷʁ
ͳʹ͔ؒҧ͍͑ͯΔͷͰ…
Τϥʔͷޙ࢝ͷಛ • ঢ়گʹΑͬͯมΘΓ͕ͪ • ϦτϥΠ • ϩάʹు͍ͯఘΊΔ (ϑΝΠϧ/ඪ४ग़ྗ) • ผͷؔʹϑΥʔϧόοΫ͢Δ
• etc
Τϥʔൃੜͷύλʔϯ • ҧ͏ؔͰಉ͡Τϥʔ͕ى͖Δ͜ͱසग़ • ྫ) http_get()ͱhttp_post()ϗετ໊͕ղܾ Ͱ͖ͳ͚Εಉ͡Τϥʔ • ͍͍ͪͪॲཧΛॻ͍ͯͨΒίϐϖͩΒ͚ʹͳ Δ
ൃੜͱޙ࢝Λ ͠·͠ΐ͏
͠ɺhttp_getؔͷ༷͕ • ʮऔಘͰ͖ͳ͔ͬͨΒΤϥʔΛ௨͢Δʯ(͋ ͑ͯԿॲཧ͠ͳ͍)ͩͬͨΒʁ • ঢ়گʹԠͯ͡ΤϥʔॲཧΛมߋͰ͖Δ✅ • ΤϥʔॲཧΛڞ௨ԽͰ͖Δ✅
ΤϥʔΛ௨͢ΔͨΊʹ • શͯͷॲཧதࢭ • ޙ࢝Ͱඞཁͳใͷίϐʔ͕ඞཁ • ʮԿ͕ى͖ͨͷ͔ʯ • ʮͲͷॲཧΛ͍ͯͨ͠࠷தͳͷ͔ʯ
Τϥʔͷ௨ํ๏͍Ζ͍Ζ • Τϥʔίʔυ(int)Λฦ͢ (Cݴޠͱ͔) • ίʔϧόοΫΛذ͢Δ(Promise) • ΤϥʔΛλϓϧͰฦ͢ (Goͱ͔) •
ྫ֎Λ͛Δ
ྫ֎Ҏ֎ͷྲྀͷ ͠·ͤΜ
ྫ֎ΛUISPX͢Δؔ ྫ֎ΛUISPX͢Δؔ ྫ֎ΛUISPX͢Δؔ ຊ൪ڥͰ DBUDI͢Δؔ ։ൃڥͰ DBUDI͢Δؔ Τϥʔ͕ى͖ͨΒ ྫ֎Λ͛Δ͚ͩ େଟͬͪ͜
ྫ֎Λੳͯ͠ దͳޙ࢝Λ͢Δ
͋ΔؔͷҰੜ ॲཧ։࢝ ਖ਼ৗऴྃ ؔݺͼग़͠ ؔݺͼग़͠
ྫ֎͕throw͞ΕͨΒ ॲཧ։࢝ try catch UISPXOFX 999&YDFQUJPO (͜ͷลͷॲཧ࣮ߦ͞Εͳ͍ catchʹॻ͍ͯ͋Δॲཧ
ྫ֎͕ͬͯ͘ΕΔ͜ͱ • ✅શͯͷॲཧதࢭ • ✅ޙ࢝ͰඞཁͳใΛ$eʹؚΊΒΕΔ • ✅͋ͱͰ·ͱΊͯtry ~ catch Ͱ͖Δ
2ষͷ·ͱΊ • ΤϥʔॲཧΛ៉ྷʹ͢Δʹɺൃੜͱޙ࢝ Λ͚ͯॻ͘ͱΑ͍ • ྫ֎͜ͷͨΊͷػೳ
3ষ PHPͷΤϥʔͱྫ֎
ͷ Τϥʔؔ ྺ࢙తܦҢͰෳࡶ
ʮΤϥʔʯ ͱ ʮྫ֎ʯ
PHPͷʮΤϥʔʯ • PHPΤϯδϯࣗମ͕ΤϥʔΛ௨͢Δͱ͖ʹ ͏ • ใจࣈྻͷΈ • ໌ࣔతʹൃੜͤ͞Δ͜ͱͰ͖Δ • trigger_error("ഇࢭ༧ఆ",
E_USER_DEPRECATED)
ΤϥʔϨϕϧʹΑͬͯಈ͖͕ҧ ͏ • E_ERROR ... ॲཧ͕தஅ͞ΕΔɻ΄΅෮ؼͰ͖ͳ͍ • E_WARNING, E_NOTICE ͦͷଞଟ
... ॲཧதஅ͞Εͳ͍
PHPͷʮྫ֎ʯ • PHP5͔Βಋೖ͞Εͨʮྫ֎ॲཧػߏʯ • ॊೈʹΩϟονͰ͖ͯແࢹͰ͖ͳ͍ • ྫ֎Ϋϥεࣗ༝ʹ֦ுͰ͖Δ • ͖ͳใΛ٧ΊͯOK
Τϥʔ ྫ֎ ੲ͔Β͋Δ 1)1Ҏ߱ ΤϥʔϝοηʔδͷΈؚΊΒΕΔ ԿͰؚΊΒΕΔɺ ΦϒδΣΫτ͝ͱ͛ΒΕΔ ΈࠐΈͷΤϥʔϨϕϧ͔Β બͿ͔͠ͳ͍ ͍͘ΒͰܕΛ૿ͤΔ
֦ுͰ͖Δ ઃఆ!ԋࢉࢠͰ ؆୯ʹແࢹͰ͖Δ ແࢹͰ͖ͳ͍ ѲΓͭͿ͢ίʔυॻ͚Δ
Ͳ͏ݟͯ ྫ֎ͷํ͕ߴػೳ
ΤϥʔΛྫ֎ʹม͢Δຐ๏ →Τϥʔෆཁͳͷʁ
ͦΜͳ͜ͱͳ͍Α ΤϥʔศརͳࢠͩΑ
Τϥʔͷॴ=ແࢹͰ͖Δ͜ͱ • ઃఆͰҰׅແࢹ or @ԋࢉࢠͰݸผʹແࢹ • ʮॲཧΛࢭΊΔඞཁͳ͍͕ɺϓϩάϥϚʹ Ұݴڭ͍͑ͨʯͱ͖ͬͪ͜ͷํ͕ศར • E_DEPRECATED͕දతͳྫ
ϥΠϒϥϦͷAPIΛมߋ͍ͨ͠ ͱ͖ function doSomething() { trigger_error( 'doSomethingͷΘΓʹdoSomething2ΛͬͯԼ͍͞', E_USER_DEPRECATED ); return
doSomething2(); }
deprecatedΛྫ֎ʹ͢Δͱ • ྫ֎ແࢹͰ͖ͳ͍ͷͰ… • ݹ͍ؔΛ͍ͬͯΔશ͕ͯյΕΔ • શ෦मਖ਼͠ͳ͍ͱҠߦͰ͖ͳ͍ • मਖ਼ͯ͠Δؒɺ৽ػೳ͕͑ͳ͍ʂ
deprecated͕ΤϥʔͳΒ • Ұ୴E_DEPRECATED, E_USER_DEPRECATED Λແࢹ͢Δઃఆʹͯ͠Ξοϓσʔτ • ։ൃڥͰ༗ޮʹͯ͠ɺൃੜΛ௵͍ͯ͘͠ • ͍ͩͿݮΒͤͨΒɺຊ൪Ͱ༗ޮʹͯ͠ɺൃ ੜͷ໓Λ֬ೝ͢Δ
ଞͷखஈ • /** @deprecated */ • ௨ৗར༻ऀ͕ಡΜͰ͘Εͳ͍ͱҙຯͳ͍ • error_log •
ϩά͋͘·ͰจࣈྻͰ͔͠ͳ͍
ݸਓతͳ͍͚ • ࣗͷίʔυͰྫ֎Λ͏ • େͷPHPΤϥʔɺErrorExceptionʹม͢Δ • ͨͿΜόάͳͷͰಠࣗʹcatch͠ͳ͍ • ͨͩ͠ɺE_DEPRECATEDܥͳͲྫ֎ʹ͠ͳ͍ ํ͕ศར
set_error_handlerୈೋҾ set_error_handler( function(...){ throw new ErrorException(...); }, E_ALL ^ E_DEPRECATED
^ E_USER_DEPRECATED ^ E_USER_NOTICE ); ϋϯυϦϯάͨ͘͠ͳ͍ ΤϥʔϨϕϧΛ আ֎͓ͯ͘͠
ΤϥʔϨϕϧ͍͚ • E_ERROR ... PHP7Ͱྫ֎ʹͳͬͨ • E_WARNING, E_NOTICE ... େɺΫιίʔυ͕Ҿ͖ى͜͠
͍ͯΔͷͰྫ֎ԽɻଈࠁࢭΊͯσόοά • E_STRICT, E_DEPRECATED ... ແࢹͯ͠ಈ͘ͷͰྫ֎Խ͠ ͳ͍ɻඞཁʹԠͯ͡ࢹɺσόοά • E_USER_XXXX .. ͋͑ͯΤϥʔΛ͍ͬͯΔྫͳͷͰɺྫ֎ ʹ͠ͳ͍͍͔ͯ͘ɻ
3ষ·ͱΊ • PHPʹʮΤϥʔʯͱʮྫ֎ʯ͕͋Δ • Τϥʔ؆୯ͳ௨ͱͯ͠ศར • ྫ֎ແࢹͰ͖ͳ͍ • جຊతʹྫ֎Λ͓͏
4ষ ྫ֎҆શͱΦϒδΣΫτࢦ
ྫ֎ͷϓϥε໘ • ίʔυதʹΤϥʔॲཧ͕ొ͠ͳ͍ͷͰɺ ៉ྷʹͳΔ • ʮίʔυఀࢭʯΛࣗಈͰͬͯ͘ΕΔ • ແࢹ͢ΔͱΫϥογϡ͢ΔͷͰແࢹͰ͖ͳ͍ɻ ΤϥʔॲཧΛ͖ͬͪΓߦ͏ίʔυΛཁٻ͢Δɻ
ྫ֎ͷͳ͍ੈք $ret = doSomething(); if ($ret === false) { //
Τϥʔॲཧ͍ͬͺ͍ return false; } $ret2 = doSomething2(); if ($ret2 === false) { // Τϥʔॲཧ͍ͬͺ͍ return false; }
ྫ֎ͷ͋Δੈք $ret = doSomething(); $ret2 = doSomething2(); // ... Ͳ͔͜ݺͼग़͠ͷ
্ྲྀͷํͰҰ͚ͩ try { } catch { } ͯ͋͠ΕOK
࠶ܝɿ ྫ֎͕throw͞ΕͨΒ ॲཧ։࢝ try catch (͜ͷลͷॲཧ࣮ߦ͞Εͳ͍ catchʹॻ͍ͯ͋Δॲཧ UISPXOFX 999&YDFQUJPO
͓ؾ͖ͮͩΖ͏͔…
ྫ֎͕throw͞ΕͨΒ ॲཧ։࢝ try UISPXOFX 999&YDFQUJPO catch (͜ͷลͷॲཧ࣮ߦ͞Εͳ͍ த్ͳͱ͜ΖͰࢭ·͚ͬͨͲɺ ຊʹେৎͳͷ͔ʁ catchʹॻ͍ͯ͋Δॲཧ
ྫ֎ͷϚΠφε໘ • ͍ͭͲ͜Ͱॲཧ͕தஅ͞ΕΔ͔Θ͔Βͳ͍ • Ͳ͜Ͱதஅ͞ΕͯΞϓϦέʔγϣϯ͕յΕͳ ͍Α͏ʹؾΛ͚ͭΔඞཁ͕͋Δ • յΕͳ͍ੑ࣭Λʮྫ֎҆શʯͱݴ͏ • ྫ֎Λѻ͏ਓɺ
ৗʹҙࣝ͠ͳ͚ΕͳΒͳ͍
None
ʮྫ֎҆શʯΛάάΔͱ • C++ͷ͕ଟ͍ • ྫ֎҆શҧ=ଈࢮͷੈք • ͨͩɺݴޠؔͳ͘ॏཁͰ͢ʂ • ྫΛڍ͛·͢
ྫ1
ِͷτϥϯβΫγϣϯ $db->insert($a); doSomething(); $db->insert($b); ... ͜͜Ͱྫ֎͕ى͖ͨΒ த్ͳϨίʔυ͕Ͱ͖ͪΌ͏
DBૢ࡞தͷྫ֎ • DBૢ࡞ͷ݁Ռ͕ͬͯ͠·͏ • ෆ۩߹ͷݪҼʹͳΔ • ૢ࡞͕ਖ਼ৗʹऴΘ͔ͬͨɺԿͳ͔͔ͬͨɺ ͲͪΒ͔ʹ͢Δ = DBͷτϥϯβΫγϣϯػೳ
Λ͏
[ྫ֎҆શ]τϥϯβΫγϣϯ $db->beginTransaction(); try { $db->insert($a); doSomething(); $db->insert($b); $db->commit(); } catch
(\Exception $e) { $db->rollback(); throw $e; }
ྫ2
κϯϏΩϟογϡ if (self::$cache) return self::$cache; $result = doSomething1(); self::$cache =
$result; doSomething2($result); ͜͜Ͱྫ֎͕ى͖ͨΒʁ Ωϟογϡͬͯ͠·͏͚Ͳʁ
ण໋ͷ͍มͷѻ͍ʹҙ • Ϋϥεͷstaticมɺάϩʔόϧม • ྫ֎Ͱதஅ͞Εͯੜ͖ͬͨ·· • ྫ֎ൃੜΛτϥοϓͯ͠আ͢Δඞཁ͕͋Δ ͔
ྫ3
Cݴޠ෩ͷؔ ob_start(); doSomething(); $output = ob_get_clean(); ͜͜Ͱྫ֎͕ى͖ͨΒʁ PC@HFU@DMFBO ݺΕͳ͘Ͷʁ
ͦͦΈࠐΈͷ͕ؔ ྫ֎҆શ͡Όͳ͍ • ob_start / ob_clean • fopen / fclose
• ͕ؔରʹͳ͍ͬͯΔྫ͕݁ߏ͋Δ
PHPࣗମ͕कͬͯ͘ΕΔ҆શੑ • ؔϩʔΧϧͳมGC͕ճऩͯ͘͠ΕΔ • fopenͳͲͷϦιʔεܕࣗಈͰด͡ΒΕΔ • ͔͠͠ʮstaticมʯʮ֎෦γεςϜʯʮDBʯ ͳͲ͜ͷൣғʹؚ·Εͳ͍ • ѻ͏ਓ͕ྫ֎҆શΛҙࣝ͢Δ͔͠ͳ͍
ྫ֎҆શͷ͠͞ • ྫ֎҆શ͔Ͳ͏͔ػցతʹஅͮ͠Β͍ • ίʔυʹؔΘΔਓશһ͕कΔඞཁ͕͋Δ • ͜Ε͕͗͢͠Δ
ྫ֎҆શΛ࣮ݱ͢Δ ΠσΟΦϜू
RAII (scope & destructor) class Curl { function __construct() {
$this->ch = curl_init(); } function __destruct() { curl_close($this->ch); } }
RAII (scope & destructor) function req() { $ch = new
Curl(); //... //... } Ҏ߱ɺͲ͜Ͱॲཧ͕ தஅͯ͠σετϥΫλ͕ ޙ࢝ͯ͘͠ΕΔͷͰฏؾ
RAIIͷϋϚΓͲ͜Ζ • େ͏·͍͘͘ͷ͕ͩɺExceptionͷελο ΫτϨʔεͳͲʹั·Δͱɺण໋͕৳ͼΔ • ࢥͬͨλΠϛϯάͰclose͞Εͳ͘ͳΔ͔
ൣғͰcatchͯ͠re-throw try { ... } catch (Exception $e) { ...
//ޙ࢝Λॻ͘ throw $e; }
࠷ॳ͔ΒfinallyͰॻ͘ try { $ch = curl_init(); //... } finally {
curl_close($ch); }
ྫ֎ͱਖ਼͖͘͠߹͏ ͷ͍͠
͔͠͠ ʮྫ֎ࣗମΛΘͳ͍ʯ ͷ͍͠
4ষ ྫ֎҆શͱΦϒδΣΫτࢦ
ྫ֎ͱΦϒδΣΫτࢦ • ຊདྷɺྫ֎ΦϒδΣΫτࢦͱશؔ͘ͷͳ ͍֓೦ • PHPExceptionΫϥεΛܧঝͨ͠ΦϒδΣΫτ ͔͠throwͰ͖ͳ͍͚Ͳ • 400 ͱ͔
"Τϥʔ͕ى͖·ͨ͠" ͱ͔Λthrow Ͱ͖Δݴޠ͋Δ
ΦϒδΣΫτࢦͯ͠Δͱ • ίϯετϥΫλΛଟ༻ͨ͘͠ͳΔͣ • த్ͳঢ়ଶ͕ͳ͍͜ͱ͕อূͰ͖Δ • ίϯετϥΫλͦͷ্༷ɺ Τϥʔ௨ʹྫ֎͔͑͠ͳ͍ • return
false ͕Ͱ͖ͳ͍͔ΒͶ
ྫ) PDO • σϑΥϧτͩͱྫ֎Λు͔ͳ͍ઃఆ • $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); • ͔͠͠ɺnew PDO͢Δͱ͖ͷΤϥʔɺઃఆ
ʹؔͳ͘ৗʹ1%0&YDFQUJPO
࣮ࡍʹ࣮ߦͨ͠ྫ php > $pdo = new PDO('uso800'); PHP Warning: Uncaught
PDOException: invalid data source name in php shell code:1 Stack trace: #0 php shell code(1): PDO->__construct('uso800') #1 {main} thrown in php shell code on line 1
ͦͷଞͷࣄ • PHP7ͰE_ERROR͕ྫ֎ͷΑ͏ͳ;Δ·͍Λ ͢ΔΑ͏ʹͳͬͨ • ݴޠΈࠐΈػೳঃʑʹΤϥʔ͔Βྫ֎ʹ ஔ͖͍͑ͯͧ͘એݴ͕ग़͍ͯΔ • ͏ɺྫ֎ͷൃੜ͠ͳ͍ੈքͳͲPHPʹ ͳ͍
զʑྫ֎ͱ ڞʹੜ͖Δ͔͠ͳ͍ͷͰ͢
4ষ·ͱΊ • PHPerྫ֎҆શΛҙࣝ͠·͠ΐ͏ • ΫϥεΛ͑ྫ֎Λ͏Ҏ֎બࢶ͕ͳ͍ ͷͰɺݡ͖͘߹͍͖ͬͯ·͠ΐ͏
5ষ ϙέϞϯ
try { doSomething(); ... } catch (Exception $e) { //
do nothing }
Pokémon catching • ͨΒ͍ྫ֎ΫϥεͰcatch͍ͯ͠Δ͜ͱͷ ଏশ • RuntimeException/Exception/Throwable • (ϙέϞϯͷΩϟονϑϨʔζʮCatch 'em
allʯ͔Β࿈ͨ͠ͱࢥΘΕΔʣ
Pokémon catchingΛ ͍͚ͬͯͳ͍
try { doSomething(); ... } catch (Exception $e) { //
do nothing }
ԿΛั·͍͑ͨͷ…ʁ • ྫ֎͍ΖΜͳؔͰൃੜ͢ΔՄೳੑ͕͋Δ • PHPࣗͷΤϥʔ͔͠Εͳ͍ • ͋ͳͨຊʹશͯΛదʹޙॲཧͯ͠Δʁ • ͦ͏Ͱͳ͚Εɺࣗͷҙਤͨ͠ྫ֎ͷΈʹ ߜ͓ͬͯ͘
set_error_handlerͱͷ Έ߹Θͤ • PHPΤϥʔΛErrorExceptionʹม͢Δ͜ͱ ͕Ͱ͖Δ • Pokémon catching͕Έ߹Θ͞Δͱࠈ
None
ྫ֎ॲཧʹר͖ࠐ·Εͯtypo ͷҐஔ͕Θ͔Βͳ͍…ʂ
ɾPokémon catching • ྫ֎ࣗͷͨΊʹ༻ҙ͢Δ & ͦΕͷΈΛ catch͢Δ • class HogeException
extends \RuntimeException • setterΛ૿͠·͠ΐ͏
Guzzleͷྫ
ޙ࢝͢ΔਓͷͨΊʹ • ඞཁͦ͏ͳΛExceptionΫϥεʹ٧ΊΒΕΔ Α͏ʹ͢Δ • throw (new HogeException($message, $code)) ->setFoo($foo)
->setMoo($moo);
ͱ͍͑ɺຊ൪Ͱcatch͞Εͳ ͍ྫ֎͕ى͖ͨΒϠόΠ…ʂ
None
อݥͷset_exception_handler • catch͞Εͳ͔ͬͨྫ֎Λั·͑Δ࠷ޙͷࡆ • େͨ͜͠ͱग़དྷͳ͍ͷͰɺϩΪϯάͯ͠Ϣʔ βʔʹΤϥʔը໘ΛݟͤΔ͚ͩɺͱ͔ • ຊ൪ͷΈಈ͔͢ɺͳΜͯ͜ͱՄೳ
͜Ε͑͋͞Εྫ֎ಥ͖ൈ͚ ͳ͍ set_exception_handler( function (Throwable $e) { echo 'Τϥʔ͕ى͖·ͨ͠'; exit;
} );
શମͷ·ͱΊ
Τϥʔͱྫ֎ͷ࠶ೖ • PHPͷΤϥʔແࢹͰ͖Δ͜ͱʹՁ͕͋Γ· ͢ɻdeprecatedͱͯ͠ͷ͍ํΦεεϝ • ྫ֎ศརͰ͕͢ɺྫ֎҆શΛҙࣝ͠ͳ͚Ε͍ ͚ͳ͍͜ͱPHPͰมΘΓ·ͤΜ • ExceptionThrowableΛอݥతҎ֎Ͱcatch͠ ͳ͍Α͏ʹ͠·͠ΐ͏
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