DockerのPHPは結局どのphp.ini使えばいいんだ問題

環境

• PHP 7.4

どのphp.ini使えばいいんだ問題

DockerのPHPでは/usr/local/etc/php/php.iniがルートのphp.iniになっている

root@e2459ffbe39f:/var/www/html# php -i|grep php.ini
Configuration File (php.ini) Path => /usr/local/etc/php

が、肝心の/usr/local/etc/php/php.iniはデフォルトではいない。その代わり、php.ini-developmentとphp.ini-productionが別途同じディレクトリにいる

root@e2459ffbe39f:/usr/local/etc/php# ls -l
total 148
drwxr-xr-x 1 root root  4096 Jul 12 09:22 conf.d
-rw-r--r-- 1 root root 72554 Jul 12 09:22 php.ini-development
-rw-r--r-- 1 root root 72584 Jul 12 09:22 php.ini-production

ってことは自分でイメージ作るときは適宜開発用と本番用でphp.iniをコピってくれってことなのか。

とりあえず違いをdiffコマンドで確認してみる

php.ini-developmentとphp.ini-productionの違い

root@a9133efa6266:/usr/local/etc/php# diff -u php.ini-development php.ini-production
 ;;;;;;;;;;;;;;;;;;;
 ; Quick Reference ;
@@ -365,7 +365,7 @@
 ; In production, it is recommended to turn this setting on to prohibit the output 
 ; of sensitive information in stack traces
 ; Default: Off
-zend.exception_ignore_args = Off
+zend.exception_ignore_args = On
 
 ;;;;;;;;;;;;;;;;;
 ; Miscellaneous ;
@@ -462,7 +462,7 @@
 ; Development Value: E_ALL
 ; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT
 ; http://php.net/error-reporting
-error_reporting = E_ALL
+error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
 
 ; This directive controls whether or not and where PHP will output errors,
 ; notices and warnings too. Error output is very useful during development, but
@@ -479,7 +479,7 @@
 ; Development Value: On
 ; Production Value: Off
 ; http://php.net/display-errors
-display_errors = On
+display_errors = Off
 
 ; The display of errors which occur during PHP's startup sequence are handled
 ; separately from display_errors. PHP's default behavior is to suppress those
@@ -490,7 +490,7 @@
 ; Development Value: On
 ; Production Value: Off
 ; http://php.net/display-startup-errors
-display_startup_errors = On
+display_startup_errors = Off
 
 ; Besides displaying errors, PHP can also log errors to locations such as a
 ; server-specific log, STDERR, or a location specified by the error_log
@@ -1190,7 +1190,7 @@
 
 ; Enable / Disable collection of memory usage statistics by mysqlnd which can be
 ; used to tune and monitor MySQL operations.
-mysqlnd.collect_memory_statistics = On
+mysqlnd.collect_memory_statistics = Off
 
 ; Records communication from all extensions using mysqlnd to the specified log
 ; file.
@@ -1563,7 +1563,7 @@
 ; Development Value: 1
 ; Production Value: -1
 ; http://php.net/zend.assertions
-zend.assertions = 1
+zend.assertions = -1
 
 ; Assert(expr); active by default.
 ; http://php.net/assert.active
@@ -1883,7 +1883,7 @@
 
 ; Enables or disables copying of PHP code (text segment) into HUGE PAGES.
 ; This should improve performance, but requires appropriate OS configuration.
-;opcache.huge_code_pages=0
+;opcache.huge_code_pages=1
 
 ; Validate cached file permissions.
 ;opcache.validate_permission=0

エラーを画面に出さないとか、メトリクス取らないとかの値が違っている。違いの表が以下

	dev	production
zend.exception_ignore_args	off	on
error_reporting	E_ALL	E_ALL & ~E_DEPRECATED & ~E_STRICT
display_errors	On	Off
display_startup_errors	On	Off
mysqlnd.collect_memory_statistics	On	Off
zend.assertions	1	-1
opcache.huge_code_pages	0	1

当然本番ではphp.ini-productionをphp.iniにコピーして使ったほうがいいのがわかった。

デフォルトとphp.ini-developmentと違い

デフォルトではphp.iniがないが、php.ini-developmentをphp.iniにリネームして使ったときと同じになるのかというと「ならない」検証方法はphp -iの結果をdiffで比較。

実は微妙に差があるので比較表が以下 display_startup_errorsの値とか結構重要なのも変わっている。

	なし	dev
display_startup_errors	Off	On
enable_dl	On	Off
error_reporting	no Value	32767
log_errors	Off	On
request_order	no Value	GP
short_open_tag	On	Off
variables_order	EGPCS	GPCS
Collecting memory statistics	No	Yes
session.cookie_httponly	0	No value
session.gc_divisor	100	1000
session.sid_bits_per_character	4	5
session.sid_length	32	26

これを見る限り、デフォルトのままPHPのイメージを使用するのは微妙で、明示的にphp.ini-developmentをphp.iniにコピーして使ったほうがよさそう

生のdiffが以下

-display_startup_errors => Off => Off
+display_startup_errors => On => On

-enable_dl => On => On
+enable_dl => Off => Off

-error_reporting => no value => no value
+error_reporting => 32767 => 32767

-log_errors => Off => Off
+log_errors => On => On

-request_order => no value => no value
+request_order => GP => GP

-short_open_tag => On => On
+short_open_tag => Off => Off

-variables_order => EGPCS => EGPCS
+variables_order => GPCS => GPCS

-Collecting memory statistics => No
+Collecting memory statistics => Yes

-session.cookie_httponly => 0 => 0
+session.cookie_httponly => no value => no value

-session.gc_divisor => 100 => 100
+session.gc_divisor => 1000 => 1000


-session.sid_bits_per_character => 4 => 4
-session.sid_length => 32 => 32
+session.sid_bits_per_character => 5 => 5
+session.sid_length => 26 => 26