Docker + php8にGDライブラリをインストールするDockerfileの書き方

2022/05/23

テクノロジー

t f B! P L
eyecatch Dockerと掛けまして、船着場のレンタル屋さんと解きます、 そのココロは・・・「コンテナかそうか」 IT謎かけ勉強中の、ユゲタです。 最近ローカル環境を全て、Docker環境に変更して、macのbrewすら使わなくなって1年ぐらい経ちますが、 なんか、以前作ったシステムの画像表示がうまくできなくて、なんでかな〜?と考えていた時に、 dockerで立ち上げているphpにGDライブラリがインストールされていないと言うことに、今頃になって気がつきました。 DockerのイメージでPHPを最新のバージョン8にして喜んでいたのも束の間、GDライブラリってそのPHPイメージには同梱されていない上、イメージがalphineという軽量化されたイメージなので、 apt-getも使えないときた・・・なんか背水の陣なのかと考えたけど、 結果的に、webpライブラリも一緒にインストールすることができるようになったので、そのやり方を備忘録として、記述しておきます。

docker-compose環境

version: '3' services: php: container_name : php build : ./php volumes: - %webサイトのドキュメントroot相対パス%:/var/www/html working_dir: /var/www/html nginx: container_name: nginx image: nginx:1.19.5-alpine ports: - 8888:80 volumes: - ./nginx/default.conf:/etc/nginx/conf.d/default.conf - %webサイトのドキュメントroot相対パス%:/var/www/html depends_on: - php 【注意】%webサイトのドキュメントroot相対パス%には、自分の環境の開発フォルダのroot階層を相対パスで記述してください。 server { listen 80; server_name localhost; index index.php index.html; root /var/www/html; location ~ \.php$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_pass php:9000; fastcgi_index index.php; include fastcgi_params; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_path_info; } } FROM php:8.1-fpm-alpine RUN apk update && \ # apk upgrade && \ apk add --update --no-cache \ # autoconf \ # zlib1g-dev \ libjpeg-turbo-dev \ libwebp-dev \ libpng-dev # libxml2-dev \ # libxslt-dev RUN docker-php-ext-configure gd --with-jpeg # RUN docker-php-ext-configure gd # RUN docker-php-ext-install gd RUN docker-php-ext-install -j$(nproc) gd # RUN apk add php8.1-gd

確認方法

dockerを立ち上げたら、環境構築のroot階層にinfo.phpを置いて、その中を見てみましょう。 ちなみに、dockerの立ち上げは、docker-compose.ymlが置かれた場所で次のコマンドを実行しましょう。(わからない人の為に書いておきます)
$ docker-compose up -d
info.phpの中身は次の通りです。 <?php phpinfo(); http://localhost:8888/info.php のアドレスにアクセスすると、info画面が現れます。 重要なのはgdの箇所がちゃんと表示されていて、対象のモジュールがenableになっているかどうかです。 jpeg , png , gif, webpがそれぞれ、enableになっているのが確認できたら成功です。 無事にphpでgd操作ができるようになって、画像のバイナリが扱えるようになります。

ワンステップアップの余談

info.phpをいちいち設置するのが、面倒くさい、手間がかかる、時間がない、やってらんない、という人のために、コマンドでサクっと確認できる方法を最後に記述しておきます。 まずdocker-composeでコンテナを立ち上げた後で、次のコマンドでコンテナ内に入ります。
$docker exec -it php ash
次に、phpinfoを表示するには、次のコマンドです。
$php -r 'phpinfo();'
結果は次のような感じです。※まあまあ長いです。 phpinfo() PHP Version => 8.1.5 System => Linux b27da3fb0b11 5.10.104-linuxkit #1 SMP PREEMPT Thu Mar 17 17:05:54 UTC 2022 aarch64 Build Date => Apr 19 2022 00:23:17 Build System => Linux 9b762f72f3fb 5.13.0-1021-oracle #26~20.04.1-Ubuntu SMP Mon Mar 7 14:30:17 UTC 2022 aarch64 GNU/Linux Configure Command => './configure' '--build=aarch64-linux-musl' '--with-config-file-path=/usr/local/etc/php' '--with-config-file-scan-dir=/usr/local/etc/php/conf.d' '--enable-option-checking=fatal' '--with-mhash' '--with-pic' '--enable-ftp' '--enable-mbstring' '--enable-mysqlnd' '--with-password-argon2' '--with-sodium=shared' '--with-pdo-sqlite=/usr' '--with-sqlite3=/usr' '--with-curl' '--with-iconv=/usr' '--with-openssl' '--with-readline' '--with-zlib' '--disable-phpdbg' '--with-pear' '--disable-cgi' '--enable-fpm' '--with-fpm-user=www-data' '--with-fpm-group=www-data' 'build_alias=aarch64-linux-musl' Server API => Command Line Interface Virtual Directory Support => disabled Configuration File (php.ini) Path => /usr/local/etc/php Loaded Configuration File => (none) Scan this dir for additional .ini files => /usr/local/etc/php/conf.d Additional .ini files parsed => /usr/local/etc/php/conf.d/docker-php-ext-gd.ini, /usr/local/etc/php/conf.d/docker-php-ext-sodium.ini PHP API => 20210902 PHP Extension => 20210902 Zend Extension => 420210902 Zend Extension Build => API420210902,NTS PHP Extension Build => API20210902,NTS Debug Build => no Thread Safety => disabled Zend Signal Handling => enabled Zend Memory Manager => enabled Zend Multibyte Support => provided by mbstring IPv6 Support => enabled DTrace Support => disabled Registered PHP Streams => https, ftps, compress.zlib, php, file, glob, data, http, ftp, phar Registered Stream Socket Transports => tcp, udp, unix, udg, ssl, tls, tlsv1.0, tlsv1.1, tlsv1.2, tlsv1.3 Registered Stream Filters => zlib.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, convert.*, consumed, dechunk This program makes use of the Zend Scripting Language Engine: Zend Engine v4.1.5, Copyright (c) Zend Technologies _______________________________________________________________________ Configuration Core PHP Version => 8.1.5 Directive => Local Value => Master Value allow_url_fopen => On => On allow_url_include => Off => Off arg_separator.input => & => & arg_separator.output => & => & auto_append_file => no value => no value auto_globals_jit => On => On auto_prepend_file => no value => no value browscap => no value => no value default_charset => UTF-8 => UTF-8 default_mimetype => text/html => text/html disable_classes => no value => no value disable_functions => no value => no value display_errors => STDOUT => STDOUT display_startup_errors => On => On doc_root => no value => no value docref_ext => no value => no value docref_root => no value => no value enable_dl => On => On enable_post_data_reading => On => On error_append_string => no value => no value error_log => no value => no value error_prepend_string => no value => no value error_reporting => no value => no value expose_php => On => On extension_dir => /usr/local/lib/php/extensions/no-debug-non-zts-20210902 => /usr/local/lib/php/extensions/no-debug-non-zts-20210902 fiber.stack_size => no value => no value file_uploads => On => On hard_timeout => 2 => 2 highlight.comment => <font style="color: #FF8000">#FF8000</font> => <font style="color: #FF8000">#FF8000</font> highlight.default => <font style="color: #0000BB">#0000BB</font> => <font style="color: #0000BB">#0000BB</font> highlight.html => <font style="color: #000000">#000000</font> => <font style="color: #000000">#000000</font> highlight.keyword => <font style="color: #007700">#007700</font> => <font style="color: #007700">#007700</font> highlight.string => <font style="color: #DD0000">#DD0000</font> => <font style="color: #DD0000">#DD0000</font> html_errors => Off => Off ignore_repeated_errors => Off => Off ignore_repeated_source => Off => Off ignore_user_abort => Off => Off implicit_flush => On => On include_path => .:/usr/local/lib/php => .:/usr/local/lib/php input_encoding => no value => no value internal_encoding => no value => no value log_errors => Off => Off mail.add_x_header => Off => Off mail.force_extra_parameters => no value => no value mail.log => no value => no value max_execution_time => 0 => 0 max_file_uploads => 20 => 20 max_input_nesting_level => 64 => 64 max_input_time => -1 => -1 max_input_vars => 1000 => 1000 memory_limit => 128M => 128M open_basedir => no value => no value output_buffering => 0 => 0 output_encoding => no value => no value output_handler => no value => no value post_max_size => 8M => 8M precision => 14 => 14 realpath_cache_size => 4096K => 4096K realpath_cache_ttl => 120 => 120 register_argc_argv => On => On report_memleaks => On => On report_zend_debug => Off => Off request_order => no value => no value sendmail_from => no value => no value sendmail_path => /usr/sbin/sendmail -t -i => /usr/sbin/sendmail -t -i serialize_precision => -1 => -1 short_open_tag => On => On SMTP => localhost => localhost smtp_port => 25 => 25 sys_temp_dir => no value => no value syslog.facility => LOG_USER => LOG_USER syslog.filter => no-ctrl => no-ctrl syslog.ident => php => php unserialize_callback_func => no value => no value upload_max_filesize => 2M => 2M upload_tmp_dir => no value => no value user_dir => no value => no value user_ini.cache_ttl => 300 => 300 user_ini.filename => .user.ini => .user.ini variables_order => EGPCS => EGPCS xmlrpc_error_number => 0 => 0 xmlrpc_errors => Off => Off zend.assertions => 1 => 1 zend.detect_unicode => On => On zend.enable_gc => On => On zend.exception_ignore_args => Off => Off zend.exception_string_param_max_len => 15 => 15 zend.multibyte => Off => Off zend.script_encoding => no value => no value zend.signal_check => Off => Off ctype ctype functions => enabled curl cURL support => enabled cURL Information => 7.80.0 Age => 9 Features AsynchDNS => Yes CharConv => No Debug => No GSS-Negotiate => No IDN => No IPv6 => Yes krb4 => No Largefile => Yes libz => Yes NTLM => Yes NTLMWB => Yes SPNEGO => No SSL => Yes SSPI => No TLS-SRP => Yes HTTP2 => Yes GSSAPI => No KERBEROS5 => No UNIX_SOCKETS => Yes PSL => No HTTPS_PROXY => Yes MULTI_SSL => No BROTLI => Yes Protocols => dict, file, ftp, ftps, gopher, gophers, http, https, imap, imaps, mqtt, pop3, pop3s, rtsp, smb, smbs, smtp, smtps, telnet, tftp Host => aarch64-alpine-linux-musl SSL Version => OpenSSL/1.1.1n ZLib Version => 1.2.12 Directive => Local Value => Master Value curl.cainfo => no value => no value date date/time support => enabled timelib version => 2021.11 "Olson" Timezone Database Version => 2021.5 Timezone Database => internal Default timezone => UTC Directive => Local Value => Master Value date.default_latitude => 31.7667 => 31.7667 date.default_longitude => 35.2333 => 35.2333 date.sunrise_zenith => 90.833333 => 90.833333 date.sunset_zenith => 90.833333 => 90.833333 date.timezone => no value => no value dom DOM/XML => enabled DOM/XML API Version => 20031129 libxml Version => 2.9.13 HTML Support => enabled XPath Support => enabled XPointer Support => enabled Schema Support => enabled RelaxNG Support => enabled fileinfo fileinfo support => enabled libmagic => 540 filter Input Validation and Filtering => enabled Directive => Local Value => Master Value filter.default => unsafe_raw => unsafe_raw filter.default_flags => no value => no value ftp FTP support => enabled FTPS support => enabled gd GD Support => enabled GD Version => bundled (2.1.0 compatible) GIF Read Support => enabled GIF Create Support => enabled JPEG Support => enabled libJPEG Version => 8 PNG Support => enabled libPNG Version => 1.6.37 WBMP Support => enabled XBM Support => enabled BMP Support => enabled TGA Read Support => enabled Directive => Local Value => Master Value gd.jpeg_ignore_warning => 1 => 1 hash hash support => enabled Hashing Engines => md2 md4 md5 sha1 sha224 sha256 sha384 sha512/224 sha512/256 sha512 sha3-224 sha3-256 sha3-384 sha3-512 ripemd128 ripemd160 ripemd256 ripemd320 whirlpool tiger128,3 tiger160,3 tiger192,3 tiger128,4 tiger160,4 tiger192,4 snefru snefru256 gost gost-crypto adler32 crc32 crc32b crc32c fnv132 fnv1a32 fnv164 fnv1a64 joaat murmur3a murmur3c murmur3f xxh32 xxh64 xxh3 xxh128 haval128,3 haval160,3 haval192,3 haval224,3 haval256,3 haval128,4 haval160,4 haval192,4 haval224,4 haval256,4 haval128,5 haval160,5 haval192,5 haval224,5 haval256,5 MHASH support => Enabled MHASH API Version => Emulated Support iconv iconv support => enabled iconv implementation => libiconv iconv library version => 1.16 Directive => Local Value => Master Value iconv.input_encoding => no value => no value iconv.internal_encoding => no value => no value iconv.output_encoding => no value => no value json json support => enabled libxml libXML support => active libXML Compiled Version => 2.9.13 libXML Loaded Version => 20913 libXML streams => enabled mbstring Multibyte Support => enabled Multibyte string engine => libmbfl HTTP input encoding translation => disabled libmbfl version => 1.3.2 mbstring extension makes use of "streamable kanji code filter and converter", which is distributed under the GNU Lesser General Public License version 2.1. Multibyte (japanese) regex support => enabled Multibyte regex (oniguruma) version => 6.9.7 Directive => Local Value => Master Value mbstring.detect_order => no value => no value mbstring.encoding_translation => Off => Off mbstring.http_input => no value => no value mbstring.http_output => no value => no value mbstring.http_output_conv_mimetypes => ^(text/|application/xhtml\+xml) => ^(text/|application/xhtml\+xml) mbstring.internal_encoding => no value => no value mbstring.language => neutral => neutral mbstring.regex_retry_limit => 1000000 => 1000000 mbstring.regex_stack_limit => 100000 => 100000 mbstring.strict_detection => Off => Off mbstring.substitute_character => no value => no value mysqlnd mysqlnd => enabled Version => mysqlnd 8.1.5 Compression => supported core SSL => supported extended SSL => supported Command buffer size => 4096 Read buffer size => 32768 Read timeout => 86400 Collecting statistics => Yes Collecting memory statistics => No Tracing => n/a Loaded plugins => mysqlnd,debug_trace,auth_plugin_mysql_native_password,auth_plugin_mysql_clear_password,auth_plugin_caching_sha2_password,auth_plugin_sha256_password API Extensions => openssl OpenSSL support => enabled OpenSSL Library Version => OpenSSL 1.1.1n 15 Mar 2022 OpenSSL Header Version => OpenSSL 1.1.1n 15 Mar 2022 Openssl default config => /etc/ssl1.1/openssl.cnf Directive => Local Value => Master Value openssl.cafile => no value => no value openssl.capath => no value => no value pcre PCRE (Perl Compatible Regular Expressions) Support => enabled PCRE Library Version => 10.39 2021-10-29 PCRE Unicode Version => 14.0.0 PCRE JIT Support => enabled PCRE JIT Target => ARM-64 64bit (little endian + unaligned) Directive => Local Value => Master Value pcre.backtrack_limit => 1000000 => 1000000 pcre.jit => 1 => 1 pcre.recursion_limit => 100000 => 100000 PDO PDO support => enabled PDO drivers => sqlite pdo_sqlite PDO Driver for SQLite 3.x => enabled SQLite Library => 3.36.0 Phar Phar: PHP Archive support => enabled Phar API version => 1.1.1 Phar-based phar archives => enabled Tar-based phar archives => enabled ZIP-based phar archives => enabled gzip compression => enabled bzip2 compression => disabled (install ext/bz2) Native OpenSSL support => enabled Phar based on pear/PHP_Archive, original concept by Davey Shafik. Phar fully realized by Gregory Beaver and Marcus Boerger. Portions of tar implementation Copyright (c) 2003-2009 Tim Kientzle. Directive => Local Value => Master Value phar.cache_list => no value => no value phar.readonly => On => On phar.require_hash => On => On posix POSIX support => enabled readline Readline Support => enabled Readline library => 8.1 Directive => Local Value => Master Value cli.pager => no value => no value cli.prompt => \b \> => \b \> Reflection Reflection => enabled session Session Support => enabled Registered save handlers => files user Registered serializer handlers => php_serialize php php_binary Directive => Local Value => Master Value session.auto_start => Off => Off session.cache_expire => 180 => 180 session.cache_limiter => nocache => nocache session.cookie_domain => no value => no value session.cookie_httponly => 0 => 0 session.cookie_lifetime => 0 => 0 session.cookie_path => / => / session.cookie_samesite => no value => no value session.cookie_secure => 0 => 0 session.gc_divisor => 100 => 100 session.gc_maxlifetime => 1440 => 1440 session.gc_probability => 1 => 1 session.lazy_write => On => On session.name => PHPSESSID => PHPSESSID session.referer_check => no value => no value session.save_handler => files => files session.save_path => no value => no value session.serialize_handler => php => php session.sid_bits_per_character => 4 => 4 session.sid_length => 32 => 32 session.upload_progress.cleanup => On => On session.upload_progress.enabled => On => On session.upload_progress.freq => 1% => 1% session.upload_progress.min_freq => 1 => 1 session.upload_progress.name => PHP_SESSION_UPLOAD_PROGRESS => PHP_SESSION_UPLOAD_PROGRESS session.upload_progress.prefix => upload_progress_ => upload_progress_ session.use_cookies => 1 => 1 session.use_only_cookies => 1 => 1 session.use_strict_mode => 0 => 0 session.use_trans_sid => 0 => 0 SimpleXML SimpleXML support => enabled Schema support => enabled sodium sodium support => enabled libsodium headers version => 1.0.18 libsodium library version => 1.0.18 SPL SPL support => enabled Interfaces => OuterIterator, RecursiveIterator, SeekableIterator, SplObserver, SplSubject Classes => AppendIterator, ArrayIterator, ArrayObject, BadFunctionCallException, BadMethodCallException, CachingIterator, CallbackFilterIterator, DirectoryIterator, DomainException, EmptyIterator, FilesystemIterator, FilterIterator, GlobIterator, InfiniteIterator, InvalidArgumentException, IteratorIterator, LengthException, LimitIterator, LogicException, MultipleIterator, NoRewindIterator, OutOfBoundsException, OutOfRangeException, OverflowException, ParentIterator, RangeException, RecursiveArrayIterator, RecursiveCachingIterator, RecursiveCallbackFilterIterator, RecursiveDirectoryIterator, RecursiveFilterIterator, RecursiveIteratorIterator, RecursiveRegexIterator, RecursiveTreeIterator, RegexIterator, RuntimeException, SplDoublyLinkedList, SplFileInfo, SplFileObject, SplFixedArray, SplHeap, SplMinHeap, SplMaxHeap, SplObjectStorage, SplPriorityQueue, SplQueue, SplStack, SplTempFileObject, UnderflowException, UnexpectedValueException sqlite3 SQLite3 support => enabled SQLite Library => 3.36.0 Directive => Local Value => Master Value sqlite3.defensive => On => On sqlite3.extension_dir => no value => no value standard Dynamic Library Support => enabled Path to sendmail => /usr/sbin/sendmail -t -i Directive => Local Value => Master Value assert.active => On => On assert.bail => Off => Off assert.callback => no value => no value assert.exception => On => On assert.warning => On => On auto_detect_line_endings => Off => Off default_socket_timeout => 60 => 60 from => no value => no value session.trans_sid_hosts => no value => no value session.trans_sid_tags => a=href,area=href,frame=src,form= => a=href,area=href,frame=src,form= unserialize_max_depth => 4096 => 4096 url_rewriter.hosts => no value => no value url_rewriter.tags => form= => form= user_agent => no value => no value tokenizer Tokenizer Support => enabled xml XML Support => active XML Namespace Support => active libxml2 Version => 2.9.13 xmlreader XMLReader => enabled xmlwriter XMLWriter => enabled zlib ZLib Support => enabled Stream Wrapper => compress.zlib:// Stream Filter => zlib.inflate, zlib.deflate Compiled Version => 1.2.12 Linked Version => 1.2.12 Directive => Local Value => Master Value zlib.output_compression => Off => Off zlib.output_compression_level => -1 => -1 zlib.output_handler => no value => no value Additional Modules Module Name Environment Variable => Value HOSTNAME => b27da3fb0b11 PHP_INI_DIR => /usr/local/etc/php SHLVL => 1 HOME => /root PHP_LDFLAGS => -Wl,-O1 -pie PHP_CFLAGS => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 PHP_VERSION => 8.1.5 GPG_KEYS => 528995BFEDFBA7191D46839EF9BA0ADA31CBD89E 39B641343D8C104B2B146DC3F9C39DC0B9698544 F1F692238FBC1666E5A5CCD4199F9DFEF6FFBAFD PHP_CPPFLAGS => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 PHP_ASC_URL => https://www.php.net/distributions/php-8.1.5.tar.xz.asc PHP_URL => https://www.php.net/distributions/php-8.1.5.tar.xz TERM => xterm PATH => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin PHPIZE_DEPS => autoconf dpkg-dev dpkg file g++ gcc libc-dev make pkgconf re2c PWD => /var/www/html PHP_SHA256 => 7647734b4dcecd56b7e4bd0bc55e54322fa3518299abcdc68eb557a7464a2e8a PHP Variables Variable => Value $_SERVER['HOSTNAME'] => b27da3fb0b11 $_SERVER['PHP_INI_DIR'] => /usr/local/etc/php $_SERVER['SHLVL'] => 1 $_SERVER['HOME'] => /root $_SERVER['PHP_LDFLAGS'] => -Wl,-O1 -pie $_SERVER['PHP_CFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $_SERVER['PHP_VERSION'] => 8.1.5 $_SERVER['GPG_KEYS'] => 528995BFEDFBA7191D46839EF9BA0ADA31CBD89E 39B641343D8C104B2B146DC3F9C39DC0B9698544 F1F692238FBC1666E5A5CCD4199F9DFEF6FFBAFD $_SERVER['PHP_CPPFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $_SERVER['PHP_ASC_URL'] => https://www.php.net/distributions/php-8.1.5.tar.xz.asc $_SERVER['PHP_URL'] => https://www.php.net/distributions/php-8.1.5.tar.xz $_SERVER['TERM'] => xterm $_SERVER['PATH'] => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin $_SERVER['PHPIZE_DEPS'] => autoconf dpkg-dev dpkg file g++ gcc libc-dev make pkgconf re2c $_SERVER['PWD'] => /var/www/html $_SERVER['PHP_SHA256'] => 7647734b4dcecd56b7e4bd0bc55e54322fa3518299abcdc68eb557a7464a2e8a $_SERVER['PHP_SELF'] => $_SERVER['SCRIPT_NAME'] => $_SERVER['SCRIPT_FILENAME'] => $_SERVER['PATH_TRANSLATED'] => $_SERVER['DOCUMENT_ROOT'] => $_SERVER['REQUEST_TIME_FLOAT'] => 1652309052.553 $_SERVER['REQUEST_TIME'] => 1652309052 $_SERVER['argv'] => Array ( ) $_SERVER['argc'] => 0 $_ENV['HOSTNAME'] => b27da3fb0b11 $_ENV['PHP_INI_DIR'] => /usr/local/etc/php $_ENV['SHLVL'] => 1 $_ENV['HOME'] => /root $_ENV['PHP_LDFLAGS'] => -Wl,-O1 -pie $_ENV['PHP_CFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $_ENV['PHP_VERSION'] => 8.1.5 $_ENV['GPG_KEYS'] => 528995BFEDFBA7191D46839EF9BA0ADA31CBD89E 39B641343D8C104B2B146DC3F9C39DC0B9698544 F1F692238FBC1666E5A5CCD4199F9DFEF6FFBAFD $_ENV['PHP_CPPFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $_ENV['PHP_ASC_URL'] => https://www.php.net/distributions/php-8.1.5.tar.xz.asc $_ENV['PHP_URL'] => https://www.php.net/distributions/php-8.1.5.tar.xz $_ENV['TERM'] => xterm $_ENV['PATH'] => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin $_ENV['PHPIZE_DEPS'] => autoconf dpkg-dev dpkg file g++ gcc libc-dev make pkgconf re2c $_ENV['PWD'] => /var/www/html $_ENV['PHP_SHA256'] => 7647734b4dcecd56b7e4bd0bc55e54322fa3518299abcdc68eb557a7464a2e8a PHP License This program is free software; you can redistribute it and/or modify it under the terms of the PHP License as published by the PHP Group and included in the distribution in the file: LICENSE This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. If you did not receive a copy of the PHP license, or have any questions about PHP licensing, please contact license@php.net. /var/www/html # php -i 'phpinfo();' | grep gd Additional .ini files parsed => /usr/local/etc/php/conf.d/docker-php-ext-gd.ini, gd 単純にここから絞り込めばいいですね。 ちなみに、php.iniがどこに設置されているか調べるには、次のコマンドです。 $ php -r 'phpinfo();' | grep php.ini

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