CentOS 7: The mbstring extension is missing
<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>