php安装过程出现的一些错误问题:

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
[root@web01 ~]# yum repolist all 没看到有webtatic源试了很多次都装不了源
解决:
#rpm -qa |grep webtatic 查看
#rpm -e 删除上面搜的包
#rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm 再执行
#yum search php71 查看yum源是否有php7.1安装包
到此webtatic源就安装上了。

 php安装过程出现的一些错误问题:

执行安装php软件：
yum install -y php71w php71w-cli php71w-common php71w-devel php71w-embedded  php71w-gd php71w-mcrypt php71w-mbstring php71w-pdo php71w-xml php71w-fpm php71w-mysqlnd php71w-opcache  php71w-pecl-memcached php71w-pecl-redis php71w-pecl-mongodb
报错:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed
字面翻译就是deltarpm没有安装，接下来我们安装就是了
解决:
yum provides '*/applydeltarpm'    #查看依赖包的位置
yum -y  install deltarpm             #安装命令
再执行安装php软件命令，报错：
Downloading packages:
No Presto metadata available for webtatic 没有webtatic元数据
解决:
#yum clean all
#yum makecache

继续安装报错:
[Errno 12] Timeout on https://us-east.repo.webtatic.com/yum/el7/x86_64/RPMS/php71w-cli-7.1.33-1.w7.x86_64.rpm: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
[Errno 14] curl#6 - "Could not resolve host: us-east.repo.webtatic.com; Unknown error"
webtatic 源无法访问导致yum无法使用
解决:
#vi /etc/resolve.conf
nameserver 8.8.8.8
#yum clean all
#yum makecache
#继续执行安装php操作又报错:
Could not resolve host: uk.repo.webtatic.com; Unknown error
warning: /var/cache/yum/x86_64/7/webtatic/packages/php71w-gd-7.1.33-1.w7.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 62e74ca5: NOKEY
php71w-gd-7.1.33-1.w7.x86_64.rpm 的公钥尚未安装
解决：安装现有的 gpg 公钥，直接把所有的都安装
[root@web01 ~]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-*
还是一直安装不了?

webtatic 源无法访问导致yum无法使用:
14: curl#6 - "Could not resolve host: mirror.webtatic.com; Unknown error"
无法解析主机（域名）
修改/etc/yum.repos.d/webtatic.repo
baseurl=https://us-east.repo.webtatic.com/yum/el7/x86_64
[root@web01 ~]# yum --执行安装就好了(注意它有可能会一直尝试别的镜像，不用管它耐心等待即可)