title: trying to install php gd extension php55-common conflicts with php-common-5.3
body: <p>I am trying to install php gd extension on php5.5 amazon ec2 server 
  using this command</p>
  
  <pre><code>yum install php-gd
  </code></pre>
  
  <p>log: </p>
  
  <pre><code>Loaded plugins: priorities, update-motd, upgrade-helper
  Resolving Dependencies
  --&gt; Running transaction check
  ---&gt; Package php-gd.x86_64 0:5.3.28-1.5.amzn1 will be installed
  --&gt; Processing Dependency: php-common(x86-64) = 5.3.28-1.5.amzn1 for package: php-gd-5.3.28-1.5.amzn1.x86_64
  --&gt; Processing Dependency: libXpm.so.4()(64bit) for package: php-gd-5.3.28-1.5.amzn1.x86_64
  --&gt; Processing Dependency: libt1.so.5()(64bit) for package: php-gd-5.3.28-1.5.amzn1.x86_64
  --&gt; Running transaction check
  ---&gt; Package libXpm.x86_64 0:3.5.10-2.9.amzn1 will be installed
  ---&gt; Package php-common.x86_64 0:5.3.28-1.5.amzn1 will be installed
  ---&gt; Package t1lib.x86_64 0:5.1.2-6.5.amzn1 will be installed
  --&gt; Processing Conflict: php55-common-5.5.14-1.75.amzn1.x86_64 conflicts php-common &lt; 5.5.14-1.75.amzn1
  --&gt; Finished Dependency Resolution
  Error: php55-common conflicts with php-common-5.3.28-1.5.amzn1.x86_64
  You could try using --skip-broken to work around the problem
  You could try running: rpm -Va --nofiles --nodigest
  </code></pre>
  
  <p>I tried to do this </p>
  
  <pre><code> sudo yum remove php-common
   sudo yum install php55
  </code></pre>
  
  <p>but nothing changed</p>