How to delete incidents using ROQL

Summary

Attempting to use this code snippet to delete incident records?

Content

Hi , I was reading through the ConnectPHP guide for Oracle 18A , I want to be able to delete records using this code snippet. Would I run this from the customer portal somehow? Or am I able to log into the CLI using OPC ? 

Version

18A

Code Snippet

try{
  $ROQL = $RNCPHP."\\ROQL"; 
  $query = "delete from contact ORDER BY id desc limit 100;delete from contact ORDER BY id desc limit 100;";
    for( $i = 0; $i<100; $i++ )
     {
      query = "delete from contact ORDER BY id desc limit 100;
      $roql_rs = $ROQL::query( $query );
      $ConnectAPI::commit();
      }
}
catch (Exception $err )
{
  echo $err->getMessage();
}