我想装固定版本的php，就装php7.0.14的，以前装过，进入以前的系统

cat /etc/alpine-release显示3.4.0

apk info -a php7结果如下

WARNING: Ignoring APKINDEX.066df28d.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.b53994b4.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.24c95890.tar.gz: No such file or directory
php7-7.0.14-r5 description:
The PHP language runtime engine - 7th branch

php7-7.0.14-r5 webpage:
http://www.php.net/

php7-7.0.14-r5 installed size:
7856128

php7-7.0.14-r5 depends on:
php7-common
so:libc.musl-x86_64.so.1
so:libedit.so.0
so:libxml2.so.2

php7-7.0.14-r5 provides:

php7-7.0.14-r5 is required by:
php7-phar-7.0.14-r5

php7-7.0.14-r5 contains:
usr/bin/php7

php7-7.0.14-r5 triggers:

php7-7.0.14-r5 has auto-install rule:

php7-7.0.14-r5 affects auto-installation of:

php7-7.0.14-r5 replaces:

php7-7.0.14-r5 license:
PHP-3

谷歌搜索结果说

apk add php7=7.0.14-r5就可以了，可是提示

ERROR: unsatisfiable constraints:
  php (virtual):
    provided by: php5
    required by: world[php=7.0.14-r5]