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Upgrade PHP to version 7.0

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Step1: How to configure latest Remi repository in CentOS/Fedora/RHEL

Firstly, we need to add the correct Remi repository and enable Remi update, remi release and remi-php70 repository: Go to /etc/yum.repos.d/ directory and download the latest remi repo file:
[root@ssdvps~]# wget http://rpms.famillecollet.com/enterprise/remi.repo
By default, other Remi repository would be disabled. If you want to enable it permanently, open the file vi /etc/yum.repos.d/remi.repo and change the value of enabled from 0 to 1.

Step 2: Install/Upgrade PHP to version 7.0

Firstly remove the older php installation using yum remove command as shown below:
[root@ssdvps ~]# yum remove php php-cgi php-cli php-common
Loaded plugins: fastestmirror
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package php.x86_64 0:5.3.3-49.el6 will be erased
---> Package php-cli.x86_64 0:5.3.3-49.el6 will be erased
---> Package php-common.x86_64 0:5.3.3-49.el6 will be erased
--> Processing Dependency: php-common(x86-64) = 5.3.3-49.el6 for package: php-pdo-5.3.3-49.el6.x86_64
--> Processing Dependency: php-common(x86-64) = 5.3.3-49.el6 for package: php-mysql-5.3.3-49.el6.x86_64
--> Running transaction check
---> Package php-mysql.x86_64 0:5.3.3-49.el6 will be erased
---> Package php-pdo.x86_64 0:5.3.3-49.el6 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

=====================================================================================
 Package              Arch             Version                 Repository       Size
=====================================================================================
Removing:
 php                  x86_64           5.3.3-49.el6            @base           3.5 M
 php-cli              x86_64           5.3.3-49.el6            @base           6.2 M
 php-common           x86_64           5.3.3-49.el6            @base           2.9 M
Removing for dependencies:
 php-mysql            x86_64           5.3.3-49.el6            @base           216 k
 php-pdo              x86_64           5.3.3-49.el6            @base           168 k

Transaction Summary
=====================================================================================
Remove        5 Package(s)

Installed size: 13 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
  Erasing    : php-mysql-5.3.3-49.el6.x86_64                                     1/5
  Erasing    : php-5.3.3-49.el6.x86_64                                           2/5
  Erasing    : php-cli-5.3.3-49.el6.x86_64                                       3/5
  Erasing    : php-pdo-5.3.3-49.el6.x86_64                                       4/5
  Erasing    : php-common-5.3.3-49.el6.x86_64                                    5/5
  Verifying  : php-5.3.3-49.el6.x86_64                                           1/5
  Verifying  : php-pdo-5.3.3-49.el6.x86_64                                       2/5
  Verifying  : php-mysql-5.3.3-49.el6.x86_64                                     3/5
  Verifying  : php-cli-5.3.3-49.el6.x86_64                                       4/5
  Verifying  : php-common-5.3.3-49.el6.x86_64                                    5/5

Removed:
  php.x86_64 0:5.3.3-49.el6                  php-cli.x86_64 0:5.3.3-49.el6
  php-common.x86_64 0:5.3.3-49.el6

Dependency Removed:
  php-mysql.x86_64 0:5.3.3-49.el6            php-pdo.x86_64 0:5.3.3-49.el6

Complete!
Stop the Apache2 service
[root@ssdvps ~]# service httpd stop
Stopping httpd:                                            [  OK  ]
Now install PHP 7.0 using remi-php70 repo:
[root@ssdvps ~]# yum --enablerepo=remi-php70 install php
Sample output:
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: mirrors.clouvider.net
 * epel: mirror.freethought-internet.co.uk
 * extras: mirrors.clouvider.net
 * remi: fr.mirror.babylon.network
 * remi-php70: fr.mirror.babylon.network
 * remi-safe: fr.mirror.babylon.network
 * updates: mirrors.clouvider.net
remi                                                          | 2.9 kB     00:00
remi/primary_db                                               | 1.8 MB     00:00
remi-php70                                                    | 2.9 kB     00:00
remi-php70/primary_db                                         | 166 kB     00:00
Resolving Dependencies
--> Running transaction check
---> Package php.x86_64 0:7.0.21-1.el6.remi will be installed
--> Processing Dependency: php-common(x86-64) = 7.0.21-1.el6.remi for package: php-7.0.21-1.el6.remi.x86_64
--> Processing Dependency: php-cli(x86-64) = 7.0.21-1.el6.remi for package: php-7.0.21-1.el6.remi.x86_64
--> Running transaction check
---> Package php-cli.x86_64 0:7.0.21-1.el6.remi will be installed
---> Package php-common.x86_64 0:7.0.21-1.el6.remi will be installed
--> Processing Dependency: php-json(x86-64) = 7.0.21-1.el6.remi for package: php-common-7.0.21-1.el6.remi.x86_64
--> Running transaction check
---> Package php-json.x86_64 0:7.0.21-1.el6.remi will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=====================================================================================
 Package           Arch          Version                     Repository         Size
=====================================================================================
Installing:
 php               x86_64        7.0.21-1.el6.remi           remi-php70        2.7 M
Installing for dependencies:
 php-cli           x86_64        7.0.21-1.el6.remi           remi-php70        4.0 M
 php-common        x86_64        7.0.21-1.el6.remi           remi-php70        988 k
 php-json          x86_64        7.0.21-1.el6.remi           remi-php70         54 k

Transaction Summary
=====================================================================================
Install       4 Package(s)

Total download size: 7.7 M
Installed size: 28 M
Is this ok [y/N]: y
Downloading Packages:
(1/4): php-7.0.21-1.el6.remi.x86_64.rpm                       | 2.7 MB     00:00
(2/4): php-cli-7.0.21-1.el6.remi.x86_64.rpm                   | 4.0 MB     00:00
(3/4): php-common-7.0.21-1.el6.remi.x86_64.rpm                | 988 kB     00:00
(4/4): php-json-7.0.21-1.el6.remi.x86_64.rpm                  |  54 kB     00:00
-------------------------------------------------------------------------------------
Total                                                6.9 MB/s | 7.7 MB     00:01
warning: rpmts_HdrFromFdno: Header V4 DSA/SHA1 Signature, key ID 00f97f56: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
Importing GPG key 0x00F97F56:
 Userid : Remi Collet <RPMS@FamilleCollet.com>
 Package: remi-release-6.9-1.el6.remi.noarch (installed)
 From   : /etc/pki/rpm-gpg/RPM-GPG-KEY-remi
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : php-json-7.0.21-1.el6.remi.x86_64                                 1/4
  Installing : php-common-7.0.21-1.el6.remi.x86_64                               2/4
  Installing : php-cli-7.0.21-1.el6.remi.x86_64                                  3/4
  Installing : php-7.0.21-1.el6.remi.x86_64                                      4/4
  Verifying  : php-7.0.21-1.el6.remi.x86_64                                      1/4
  Verifying  : php-common-7.0.21-1.el6.remi.x86_64                               2/4
  Verifying  : php-cli-7.0.21-1.el6.remi.x86_64                                  3/4
  Verifying  : php-json-7.0.21-1.el6.remi.x86_64                                 4/4

Installed:
  php.x86_64 0:7.0.21-1.el6.remi

Dependency Installed:
  php-cli.x86_64 0:7.0.21-1.el6.remi       php-common.x86_64 0:7.0.21-1.el6.remi
  php-json.x86_64 0:7.0.21-1.el6.remi

Complete!

Step3: Verify PHP Version

Verify the latest installed php version using below command:
[root@ssdvps ~]# php -v
PHP 7.0.21 (cli) (built: Jul  5 2017 14:45:27) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
Start the Apache Server:

[root@ssdvps ~]# service httpd start
Starting httpd:                                            [  OK  ]

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