title: How do I connect PHP 7.x to Oracle database on RedHat / CentOS?
body: <p>I am struggling to connect my PHP application to an Oracle database. I have tried multiple options over the last week with no success. </p>
  
  <p>I have managed to install oci8 extension but the oci_connect function is not recognised. </p>
  
  <p>Please assist. </p>
  
  <p>RedHat Enterprise Linux 7.6<br>
  PHP: 7.3<br>
  Oracle: 12c<br></p>