phpという名前で始まるパッケージを削除したい場合、「yum remove php-*」でなく、「yum remove "php*"」とphp*をダブルクォーテーションで囲む必要があります。
[ap2@postgresql11-testserver-1 ~]$ rpm -qa | grep php
php-pecl-igbinary-2.0.8-1.el7.remi.7.1.x86_64
php-pear-1.10.6-1.el7.remi.noarch
php-json-7.1.24-1.el7.remi.x86_64
php-mbstring-7.1.24-1.el7.remi.x86_64
php-snmp-7.1.24-1.el7.remi.x86_64
php-pgsql-7.1.24-1.el7.remi.x86_64
php-common-7.1.24-1.el7.remi.x86_64
php-opcache-7.1.24-1.el7.remi.x86_64
php-xml-7.1.24-1.el7.remi.x86_64
php-process-7.1.24-1.el7.remi.x86_64
php-pecl-msgpack-2.0.2-1.el7.remi.7.1.x86_64
php-pdo-7.1.24-1.el7.remi.x86_64
php-mysqlnd-7.1.24-1.el7.remi.x86_64
php-soap-7.1.24-1.el7.remi.x86_64
php-pecl-memcached-3.0.4-2.el7.remi.7.1.x86_64
php-gd-7.1.24-1.el7.remi.x86_64
php-ldap-7.1.24-1.el7.remi.x86_64
php-7.1.24-1.el7.remi.x86_64
php-xmlrpc-7.1.24-1.el7.remi.x86_64
php-cli-7.1.24-1.el7.remi.x86_64
php-fedora-autoloader-1.0.0-1.el7.noarch
php-devel-7.1.24-1.el7.remi.x86_64
[root@postgresql11-testserver-1 ap2]# yum remove php-*
Loaded plugins: fastestmirror, langpacks, priorities
No Match for argument: php-fedora-autoloader-1.0.0-1.el7.src.rpm
No Packages marked for removal
[root@postgresql11-testserver-1 ap2]# yum remove "php*"
Loaded plugins: fastestmirror, langpacks, priorities
Resolving Dependencies
--> Running transaction check
---> Package php.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-cli.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-common.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-devel.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-fedora-autoloader.noarch 0:1.0.0-1.el7 will be erased
---> Package php-gd.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-json.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-ldap.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-mbstring.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-mysqlnd.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-opcache.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-pdo.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-pear.noarch 1:1.10.7-3.el7.remi will be erased
---> Package php-pecl-igbinary.x86_64 0:2.0.8-1.el7.remi.7.1 will be erased
---> Package php-pecl-memcached.x86_64 0:3.1.3-1.el7.remi.7.1 will be erased
---> Package php-pecl-msgpack.x86_64 0:2.0.3-1.el7.remi.7.1 will be erased
---> Package php-pgsql.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-process.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-snmp.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-soap.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-xml.x86_64 0:7.1.25-2.el7.remi will be erased
---> Package php-xmlrpc.x86_64 0:7.1.25-2.el7.remi will be erased
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================================================
 Package                            Arch                Version                              Repository                Size
============================================================================================================================
Removing:
 php                                x86_64              7.1.25-2.el7.remi                    @remi-php71              9.4 M
 php-cli                            x86_64              7.1.25-2.el7.remi                    @remi-php71               14 M
 php-common                         x86_64              7.1.25-2.el7.remi                    @remi-php71              7.9 M
 php-devel                          x86_64              7.1.25-2.el7.remi                    @remi-php71               10 M
 php-fedora-autoloader              noarch              1.0.0-1.el7                          @epel                     15 k
 php-gd                             x86_64              7.1.25-2.el7.remi                    @remi-php71              204 k
 php-json                           x86_64              7.1.25-2.el7.remi                    @remi-php71               80 k
 php-ldap                           x86_64              7.1.25-2.el7.remi                    @remi-php71              129 k
 php-mbstring                       x86_64              7.1.25-2.el7.remi                    @remi-php71              2.8 M
 php-mysqlnd                        x86_64              7.1.25-2.el7.remi                    @remi-php71              850 k
 php-opcache                        x86_64              7.1.25-2.el7.remi                    @remi-php71              800 k
 php-pdo                            x86_64              7.1.25-2.el7.remi                    @remi-php71              386 k
 php-pear                           noarch              1:1.10.7-3.el7.remi                  @remi-php71              2.1 M
 php-pecl-igbinary                  x86_64              2.0.8-1.el7.remi.7.1                 @remi-php71              314 k
 php-pecl-memcached                 x86_64              3.1.3-1.el7.remi.7.1                 @remi-php71              335 k
 php-pecl-msgpack                   x86_64              2.0.3-1.el7.remi.7.1                 @remi-php71              160 k
 php-pgsql                          x86_64              7.1.25-2.el7.remi                    @remi-php71              363 k
 php-process                        x86_64              7.1.25-2.el7.remi                    @remi-php71              180 k
 php-snmp                           x86_64              7.1.25-2.el7.remi                    @remi-php71              110 k
 php-soap                           x86_64              7.1.25-2.el7.remi                    @remi-php71              616 k
 php-xml                            x86_64              7.1.25-2.el7.remi                    @remi-php71              855 k
 php-xmlrpc                         x86_64              7.1.25-2.el7.remi                    @remi-php71              165 k

Transaction Summary
============================================================================================================================
Remove  22 Packages

Installed size: 52 M
Is this ok [y/N]: