Can’t install PHP 5.5 on CentOS 6.7

I have a dedicated server on Kimsufi.
I am trying to update PHP 5.3 to PHP 5.5 on CentOS 6.7 using this guide, but unfortunately i get the following errors:

Error: Package: php-mysql-5.4.45-1.el6.remi.x86_64 (remi)
       Requires: php-pdo(x86-64) = 5.4.45-1.el6.remi
       Removing: php-pdo-5.3.3-27.el6.2.x86_64 (@LocalRepo)
           php-pdo(x86-64) = 5.3.3-27.el6.2
       Updated By: php-pdo-5.5.29-1.el6.remi.x86_64 (remi-php55)
           php-pdo(x86-64) = 5.5.29-1.el6.remi
       Available: php-pdo-5.4.44-1.el6.remi.x86_64 (remi)
           php-pdo(x86-64) = 5.4.44-1.el6.remi
       Available: php-pdo-5.4.45-1.el6.remi.x86_64 (remi)
           php-pdo(x86-64) = 5.4.45-1.el6.remi
       Available: php-pdo-5.5.28-1.el6.remi.x86_64 (remi-php55)
           php-pdo(x86-64) = 5.5.28-1.el6.remi
       Available: php54w-pdo-5.4.44-1.w6.x86_64 (webtatic)
           php-pdo(x86-64) = 5.4.44-1.w6
       Available: php55w-pdo-5.5.28-1.w6.x86_64 (webtatic)
           php-pdo(x86-64) = 5.5.28-1.w6
       Available: php56w-pdo-5.6.12-1.w6.x86_64 (webtatic)
           php-pdo(x86-64) = 5.6.12-1.w6
Error: Package: php-pecl-apc-3.1.9-2.el6.x86_64 (@base)
           Requires: php(api) = 20090626
           Removing: php-common-5.3.3-27.el6.2.x86_64 (@LocalRepo)
               php(api) = 20090626
           Updated By: php-common-5.5.29-1.el6.remi.x86_64 (remi-php55)
               php(api) = 20121113-64
           Available: php-common-5.4.44-1.el6.remi.x86_64 (remi)
               php(api) = 20100412-x86-64
           Available: php-common-5.4.45-1.el6.remi.x86_64 (remi)
               php(api) = 20100412-x86-64
           Available: php-common-5.5.28-1.el6.remi.x86_64 (remi-php55)
               php(api) = 20121113-64
           Available: php54w-common-5.4.44-1.w6.x86_64 (webtatic)
               php(api) = 20100412-64
           Available: php55w-common-5.5.28-1.w6.x86_64 (webtatic)
               php(api) = 20121113-64
           Installing: php56w-common-5.6.12-1.w6.x86_64 (webtatic)
               php(api) = 20131106-64
Error: Package: php-pecl-apc-3.1.9-2.el6.x86_64 (@base)
           Requires: php(zend-abi) = 20090626
           Removing: php-common-5.3.3-27.el6.2.x86_64 (@LocalRepo)
               php(zend-abi) = 20090626
           Updated By: php-common-5.5.29-1.el6.remi.x86_64 (remi-php55)
               php(zend-abi) = 20121212-64
           Available: php-common-5.4.44-1.el6.remi.x86_64 (remi)
               php(zend-abi) = 20100525-x86-64
           Available: php-common-5.4.45-1.el6.remi.x86_64 (remi)
               php(zend-abi) = 20100525-x86-64
           Available: php-common-5.5.28-1.el6.remi.x86_64 (remi-php55)
               php(zend-abi) = 20121212-64
           Available: php54w-common-5.4.44-1.w6.x86_64 (webtatic)
               php(zend-abi) = 20100525-64
           Available: php55w-common-5.5.28-1.w6.x86_64 (webtatic)
               php(zend-abi) = 20121212-64
           Installing: php56w-common-5.6.12-1.w6.x86_64 (webtatic)
               php(zend-abi) = 20131226-64
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

What do they mean exactly and how can i fix them?

Answer

You have a conflicting repository named webtatic installed. Remove this repo (and any packages installed from it).

Once this is done, run yum distro-sync to sync your system to the latest versions of packages which are in the repositories.

At this point, you can install any additional packages you need.

Attribution
Source : Link , Question Author : Alberto Fontana , Answer Author : Michael Hampton

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