PHPのstreamで遊ぶ

#phpblt 4回目で話したネタです

Transcript

1. STREAMͰ༡Ϳ PHPBLT#4
2. ͓લͩΕΑʁ Hiraku ▸ composerʹจ۟ݴͬͯΔਓ ▸ ޫ͕஗͍ͱจ۟ݴͬͯΔਓ ▸ PHPerྺ8೥͙Β͍
3. STREAM ҙࣝͯ͠Δʁ
4. PHPʹ͓͚Δ STREAM
5. fopen, fclose, freadͳͲ CݴޠͰॻ͍ͯ͋Δ෦෼ SplFileObject, file_get_contents ετϦʔϜ (file://, php://, http://ͳͲ) ਂ෵ PHPer͕ීஈ
 ৮ͬͯΔॴ ΩϥΩϥͨ͠ ΍ͭ
6. ΋͏ͪΐͬͱਅ໘໨ͳઆ໌ PHPͷSTREAMͱ͸ ▸ UNIXͷϑΝΠϧهड़ࢠ(FD)ʹ૬౰͢ΔPHPػೳ ▸ resourceܕͷҰछ ▸ is_resource($fp) === true ▸ get_resource_type($fp) === 'stream' ▸ fopen()ͰऔΕΔ΄͔ɺSTDOUT΍STDIN΋͜ͷ஥ؒ
7. ίʔυͰݴ͑͹ <?php $fs = fopen('hoge.txt', 'r'); //↑これがストリームリソース $file = new SplFileObject('hoge.txt'); //↑内部的にはストリームリソースが存在している
8. ৭ʑछྨ͕͋Δ ▸ ϑΝΠϧύεͷઌ಄ͷ"file:// ..."ͷ෦෼Ͱ෼ذ͍ͯ͠Δ ▸ লུ͢Δͱfile://ͷҙຯʹͳΔ ▸ http:// ͱ͔ php:// ͱ͔ data:// ΋͋ΔΑ
9. ΈΜͳҙࣝͤͣʹ
 ࢖͍ͬͯΔ͸ͣʂ
10. PHPͷ"ετϦʔϜ"͕࣋ͭ ػೳ ϑΝΠϧγεςϜ
 Λந৅Խͨ͠΋ͷ ڊେͳσʔλΛѻ͑Δ ௨৴Λந৅Խ ฒߦॲཧ
11. ໊લΑ͘ͳ͍ΑͶɻɻ ▸ Node.jsͷstreamsͱ͸ҧ͏ ▸ σΟϨΫτϦͷ֓೦͕͋Δ ▸ ύΠϓͱ͔ιέοτͱ͔ ▸ ඇಉظ͚ͨ͠Ε͹ࣗ෼Ͱॻ͘ ▸ όΠφϦྻ͔͠ѻ͑ͳ͍
12. STREAMͰ༡Ϳ
13. fopen, fclose, freadͳͲ CݴޠͰॻ͍ͯ͋Δ෦෼ SplFileObject, file_get_contents ετϦʔϜ (file://, php://, http://ͳͲ) ਂ෵ PHPer͕ීஈ
 ৮ͬͯΔॴ ΩϥΩϥͨ͠ ΍ͭ
14. =حົͳ͜ͱ͕Ͱ͖Δ ਂ෵ʹ͍ۙͱ͍͏͜ͱ͸
15. STREAMͰ༡Ϳ ωλ1
16. ͝ଘ஌Ͱ͠ΐ͏͔ ૊ΈࠐΈͷstream͸ফͤΔ ▸ stream_wrapper_unregisterؔ਺ ▸ Ϋϥε΍ؔ਺͸(ී௨)ফͤͳ͍͚Ͳɺ
 stream͸ඪ४ػೳͰফͤΔ PHPͰػೳΛ ফͤΔͷ͸ΊͣΒ͍͠
17. ͼͬ͘Γ͢Δ΄ͲPHP͕໾ʹཱͨͳ͘ͳΔtips stream_wrapper_unregister('file') ▸ file://ͷొ࿥Λফ͢ ▸ require 'hoge.php'; Ͱ͖ͳ͘ͳΔ ▸ file_get_contents('hoge.php'); Ͱ͖ͳ͘ͳΔ Կ΋Ͱ͖ͳ͍ʂ
18. ΍ͬͯΈΔ $ php -a Interactive shell php > stream_wrapper_unregister('file'); php > echo file_get_contents('hoge.txt'); PHP Warning: file_get_contents(): file:// wrapper is disabled in the server configuration in php shell code on line 1 PHP Stack trace: PHP 1. {main}() php shell code:0 PHP 2. file_get_contents() php shell code:1
19. STREAMͰ༡Ϳ ωλ2
20. ͝ଘ஌Ͱ͠ΐ͏͔ ফͨ͠stream͸ࣗ࡞൛ʹஔ͖׵͑ΒΕΔ ▸ stream_wrapper_registerؔ਺ ▸ streamWrapperͬΆ͍ΫϥεΛPHPͰ࣮૷ͯ͠ొ࿥ ▸ http://php.net/manual/ja/class.streamwrapper.php stream૚ͰͷϞοΫԽ
21. <?php class Aori { private $finished = false; function stream_open($path, $mode, $options, &$opened_path) { return true; } function stream_read(int $count) { if ($this->finished) { return false; } $this->finished = true; return 'うるせーバーカ'; } function stream_eof() { return $this->finished; } function stream_stat() { return []; } } stream_wrapper_unregister('file'); stream_wrapper_register('file', 'Aori');
22. php > require 's1.php'; php > require 's1.php'; うるせーバーカ php > require 's'; うるせーバーカ php > echo file_get_contents('hoge'); うるせーバーカ ἤͬͯ͘ΔPHP͕Ͱ͖ͨ
23. STREAMͷϞοΫԽʂʂͬͯॻ͍͚ͨͲ ▸ requireͱ͔ͷΫϥεಡΈࠐΈ·ͰϞοΫԽ͞ΕͪΌ͏ ▸ ݩͷfile://͕࢖͑ͳ͘ͳΔ ▸ ͭΑ͗ͯ͢໾ʹཱͨͳ͍…
24. STREAMͰ༡Ϳ ωλ3
25. PHP PREPROCESSOR
26. ωλͩͬͨΜͰ͚͢Ͳ ͓୊ ▸ setter/getterΛ୹͘ॻ͖͍ͨ... ▸ ϚδοΫϝιου͸νϟϥ͍͔Βݏ
27. ϚΫϩͬΆ͍΋ͷΛ࡞Δ ▸ PHPͷίʔυΛు͘PHPͷίʔυΛॻ͘ ▸ 1ճ࣮ߦͨ݁͠ՌΛrequire/file_get_contentsʹ౉͢ ▸ ͱ͍͏ͷΛstreamWrapperͰ࡞Δ
28. σϞ
29. STREAM ໘ന͍Αʂ