事象
Amazon Linux 2でWordPress構築時に500エラー
アプローチ
500エラーの場合はプログラムの問題の可能性が高い。
エラー内容を確認
エラー内容が出力されない設定になっていたので、
アクセス時に実行されるプログラムに一時的に以下のコードを埋め込み、
エラー内容が表示されるようにする。
error_reporting(E_ALL);
ini_set('display_errors',1);
再度画面にアクセスすると、
Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /***/wp-includes/function.php on line 1090
と表示された。
該当行を見ると、可変長の引数をもつメソッドの定義だったので、
PHPのバージョンを疑って確認すると、
PHP5.4だった。
# php -v
PHP 5.4.16 (cli) (built: Oct 31 2019 18:34:05)
Copyright (c) 1997-2013 The PHP Group
「...」を使った可変長の引数はPHP5.6からサポートされるため、
バージョンアップが必要。
PHPのアップデート
Amazon Linux 2 EC2インスタンスのパッケージ管理ツールamazon-linux-extrasで利用可能なPHPのバージョンを確認
# amazon-linux-extras
0 ansible2 available \
[ =2.4.2 =2.4.6 =2.8 =stable ]
2 httpd_modules available [ =1.0 =stable ]
3 memcached1.5 available \
[ =1.5.1 =1.5.16 =1.5.17 ]
5 postgresql9.6 available \
[ =9.6.6 =9.6.8 =stable ]
6 postgresql10 available [ =10 =stable ]
8 redis4.0 available \
[ =4.0.5 =4.0.10 =stable ]
9 R3.4 available [ =3.4.3 =stable ]
10 rust1 available \
[ =1.22.1 =1.26.0 =1.26.1 =1.27.2 =1.31.0 =1.38.0
=stable ]
11 vim available [ =8.0 =stable ]
15 php7.2 available \
[ =7.2.0 =7.2.4 =7.2.5 =7.2.8 =7.2.11 =7.2.13 =7.2.14
=7.2.16 =7.2.17 =7.2.19 =7.2.21 =7.2.22 =7.2.23
=7.2.24 =7.2.26 =stable ]
17 lamp-mariadb10.2-php7.2 available \
[ =10.2.10_7.2.0 =10.2.10_7.2.4 =10.2.10_7.2.5
=10.2.10_7.2.8 =10.2.10_7.2.11 =10.2.10_7.2.13
=10.2.10_7.2.14 =10.2.10_7.2.16 =10.2.10_7.2.17
=10.2.10_7.2.19 =10.2.10_7.2.22 =10.2.10_7.2.23
=10.2.10_7.2.24 =stable ]
18 libreoffice available \
[ =5.0.6.2_15 =5.3.6.1 =stable ]
19 gimp available [ =2.8.22 ]
20 docker=latest enabled \
[ =17.12.1 =18.03.1 =18.06.1 =18.09.9 =stable ]
21 mate-desktop1.x available \
[ =1.19.0 =1.20.0 =stable ]
22 GraphicsMagick1.3 available \
[ =1.3.29 =1.3.32 =1.3.34 =stable ]
23 tomcat8.5 available \
[ =8.5.31 =8.5.32 =8.5.38 =8.5.40 =8.5.42 =8.5.50
=stable ]
24 epel available [ =7.11 =stable ]
25 testing available [ =1.0 =stable ]
26 ecs available [ =stable ]
27 corretto8 available \
[ =1.8.0_192 =1.8.0_202 =1.8.0_212 =1.8.0_222 =1.8.0_232
=1.8.0_242 =stable ]
28 firecracker available [ =0.11 =stable ]
29 golang1.11 available \
[ =1.11.3 =1.11.11 =1.11.13 =stable ]
30 squid4 available [ =4 =stable ]
31 php7.3 available \
[ =7.3.2 =7.3.3 =7.3.4 =7.3.6 =7.3.8 =7.3.9 =7.3.10
=7.3.11 =7.3.13 =stable ]
32 lustre2.10 available \
[ =2.10.5 =2.10.8 =stable ]
33 java-openjdk11 available [ =11 =stable ]
34 lynis available [ =stable ]
35 kernel-ng available [ =stable ]
36 BCC available [ =0.x =stable ]
37 mono available [ =5.x =stable ]
38 nginx1 available [ =stable ]
39 ruby2.6 available [ =2.6 =stable ]
40 mock available [ =stable ]
41 postgresql11 available [ =11 =stable ]
42 php7.4 available [ =stable ]
43 livepatch available [ =stable ]
44 python3.8 available [ =stable ]
45 haproxy2 available [ =stable ]
46 collectd available [ =stable ]
47 aws-nitro-enclaves-cli available [ =stable ]
48 R4 available [ =stable ]
49 kernel-5.4 available [ =stable ]
50 selinux-ng available [ =stable ]
51 php8.0 available [ =stable ]
PHP7.2が可能なのでPHP7.2にアップデートする。
# amazon-linux-extras enable php7.2
0 ansible2 available \
[ =2.4.2 =2.4.6 =2.8 =stable ]
2 httpd_modules available [ =1.0 =stable ]
3 memcached1.5 available \
[ =1.5.1 =1.5.16 =1.5.17 ]
5 postgresql9.6 available \
[ =9.6.6 =9.6.8 =stable ]
6 postgresql10 available [ =10 =stable ]
8 redis4.0 available \
[ =4.0.5 =4.0.10 =stable ]
9 R3.4 available [ =3.4.3 =stable ]
10 rust1 available \
[ =1.22.1 =1.26.0 =1.26.1 =1.27.2 =1.31.0 =1.38.0
=stable ]
11 vim available [ =8.0 =stable ]
15 php7.2=latest enabled \
[ =7.2.0 =7.2.4 =7.2.5 =7.2.8 =7.2.11 =7.2.13 =7.2.14
=7.2.16 =7.2.17 =7.2.19 =7.2.21 =7.2.22 =7.2.23
=7.2.24 =7.2.26 =stable ]
17 lamp-mariadb10.2-php7.2 available \
[ =10.2.10_7.2.0 =10.2.10_7.2.4 =10.2.10_7.2.5
=10.2.10_7.2.8 =10.2.10_7.2.11 =10.2.10_7.2.13
=10.2.10_7.2.14 =10.2.10_7.2.16 =10.2.10_7.2.17
=10.2.10_7.2.19 =10.2.10_7.2.22 =10.2.10_7.2.23
=10.2.10_7.2.24 =stable ]
18 libreoffice available \
[ =5.0.6.2_15 =5.3.6.1 =stable ]
19 gimp available [ =2.8.22 ]
20 docker=latest enabled \
[ =17.12.1 =18.03.1 =18.06.1 =18.09.9 =stable ]
21 mate-desktop1.x available \
[ =1.19.0 =1.20.0 =stable ]
22 GraphicsMagick1.3 available \
[ =1.3.29 =1.3.32 =1.3.34 =stable ]
23 tomcat8.5 available \
[ =8.5.31 =8.5.32 =8.5.38 =8.5.40 =8.5.42 =8.5.50
=stable ]
24 epel available [ =7.11 =stable ]
25 testing available [ =1.0 =stable ]
26 ecs available [ =stable ]
27 corretto8 available \
[ =1.8.0_192 =1.8.0_202 =1.8.0_212 =1.8.0_222 =1.8.0_232
=1.8.0_242 =stable ]
28 firecracker available [ =0.11 =stable ]
29 golang1.11 available \
[ =1.11.3 =1.11.11 =1.11.13 =stable ]
30 squid4 available [ =4 =stable ]
_ php7.3 available \
[ =7.3.2 =7.3.3 =7.3.4 =7.3.6 =7.3.8 =7.3.9 =7.3.10
=7.3.11 =7.3.13 =stable ]
32 lustre2.10 available \
[ =2.10.5 =2.10.8 =stable ]
33 java-openjdk11 available [ =11 =stable ]
34 lynis available [ =stable ]
35 kernel-ng available [ =stable ]
36 BCC available [ =0.x =stable ]
37 mono available [ =5.x =stable ]
38 nginx1 available [ =stable ]
39 ruby2.6 available [ =2.6 =stable ]
40 mock available [ =stable ]
41 postgresql11 available [ =11 =stable ]
_ php7.4 available [ =stable ]
43 livepatch available [ =stable ]
44 python3.8 available [ =stable ]
45 haproxy2 available [ =stable ]
46 collectd available [ =stable ]
47 aws-nitro-enclaves-cli available [ =stable ]
48 R4 available [ =stable ]
49 kernel-5.4 available [ =stable ]
50 selinux-ng available [ =stable ]
_ php8.0 available [ =stable ]
Now you can install:
# yum clean metadata
# yum install php-cli php-pdo php-fpm php-json php-mysqlnd
上記の文言通り下記のコマンドを実行
# yum clean metadata
# yum install php-cli php-do php-fpm php-json php-mysqlnd
Apacheを再起動
# systemctl restart http
これで解決しました。
最後に
バージョンをまず先に確認するといいかもしれません。