title: CentOS 7: The mbstring extension is missing
body: <p>I've installed  phpmyadmin (4.5.3.1) on CentOS 07 with apache server (httpd-2.4.18) and PHP 7.0.1. I get the error:</p>
  
  <blockquote>
    <p>The mbstring extension is missing. Please check your PHP configuration.</p>
  </blockquote>
  
  <p>So I searched the internet for this error and people came with the following solution, which I tried:</p>
  
  <p>Installing the <code>php-mbstring</code> and <code>php-mcrypt</code> extensions:</p>
  
  <pre><code>yum install php-mbstring php-mcrypt php-gd
  </code></pre>
  
  <p>this command returns:</p>
  
  <pre><code>Loaded plugins: fastestmirror, langpacks
  Loading mirror speeds from cached hostfile
   * base: mirrors.viethosting.vn
   * epel: ftp.cuhk.edu.hk
   * extras: mirrors.viethosting.vn
   * updates: mirrors.viethosting.vn
  
  Package php-mbstring-5.4.16-36.el7_1.x86_64 already installed and latest version
  
  Package php-mcrypt-5.4.16-3.el7.x86_64 already installed and latest version
  
  Package php-gd-5.4.16-36.el7_1.x86_64 already installed and latest version
  
  Nothing to do
  </code></pre>
  
  <p>Please help me!</p>