title: Can not install php 5.5 opcache on Centos 6.4
body: <p>I have php 5.5 installed on CentOS (from Remi repo, as far as I remember).</p>
  
  <p>Now I wanted to turn on opcache and configure it, but it turned out that I have no opcache.so file in the system. So I tried to install it with yum.</p>
  
  <pre><code># yum --enablerepo=remi install php-pecl-zendopcache
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
  * base: mirror.proserve.nl
  * epel: mirror.proserve.nl
  * extras: ftp.tudelft.nl
  * remi: remi.mirrors.hostinginnederland.nl
  * rpmforge: nl.mirror.eurid.eu
  * updates: mirror.proserve.nl
  Setting up Install Process
  Resolving Dependencies
  --&gt; Running transaction check
  ---&gt; Package php-pecl-zendopcache.x86_64 0:7.0.2-2.el6.remi will be installed
  --&gt; Processing Dependency: php(zend-abi) = 20100525-x86-64 for package: php-pecl-zendopcache-7.0.2-2.el6.remi.x86_64
  --&gt; Processing Dependency: php(api) = 20100412-x86-64 for package: php-pecl-zendopcache-7.0.2-2.el6.remi.x86_64
  --&gt; Finished Dependency Resolution
  Error: Package: php-pecl-zendopcache-7.0.2-2.el6.remi.x86_64 (remi)
         Requires: php(api) = 20100412-x86-64
         Installed: php-common-5.5.5-2.el6.remi.x86_64 (@remi-php55)
             php(api) = 20121113-64
         Available: php-common-5.3.3-22.el6.x86_64 (base)
             php(api) = 20090626
         Available: php-common-5.3.3-23.el6_4.x86_64 (updates)
             php(api) = 20090626
         Available: php-common-5.4.21-1.el6.remi.x86_64 (remi)
             php(api) = 20100412-x86-64
         Available: php-common-5.4.21-2.el6.remi.x86_64 (remi)
             php(api) = 20100412-x86-64
  Error: Package: php-pecl-zendopcache-7.0.2-2.el6.remi.x86_64 (remi)
         Requires: php(zend-abi) = 20100525-x86-64
         Installed: php-common-5.5.5-2.el6.remi.x86_64 (@remi-php55)
             php(zend-abi) = 20121212-64
         Available: php-common-5.3.3-22.el6.x86_64 (base)
             php(zend-abi) = 20090626
         Available: php-common-5.3.3-23.el6_4.x86_64 (updates)
             php(zend-abi) = 20090626
         Available: php-common-5.4.21-1.el6.remi.x86_64 (remi)
             php(zend-abi) = 20100525-x86-64
         Available: php-common-5.4.21-2.el6.remi.x86_64 (remi)
             php(zend-abi) = 20100525-x86-64
   You could try using --skip-broken to work around the problem
   You could try running: rpm -Va --nofiles --nodigest
  </code></pre>
  
  <p>How to cope with this problem, if I have newer versions of php installed and dependencies can not be properly resolved?</p>