Drush - Delete a group of users in Drupal 7 from the command line

drush_user_delete_example.php

<?php
// We want to preserve all accounts from a selection of email domains.
// We want to preserve system accounts with UIDs 0 and 1
// We want to delete all other accounts which are:
//  - disabled, AND
//  - have never been used, AND
//  - have never been logged into
//
// We also want to use Drupal's user_delete_multiple() function so that 
// all the necessary hooks are called throughout the system.
//
// Because this could be resource intensive, we break it up into chunks of 
// 100 records at a time.
//
// So here's the un-concatenated PHP to accomplish this task:

$domains = [
  ":1"=>"%legalshield%",
  ":2" => "%stateside%",
  ":3"=>"%legaldefence%",
  ":4"=>"%criticalmass%",
  ":5"=>"%thehangar%",
  ":6"=>"%whatarage%"
];
$users = db_query("SELECT uid FROM {users} 
                    WHERE (status=0 AND access=0 AND login=0) 
                    AND (mail NOT LIKE :1 AND mail NOT LIKE :2 AND mail NOT LIKE :3 AND mail NOT LIKE :4 AND mail NOT LIKE :5 AND mail NOT LIKE :6) 
                    AND (uid > 1)", $domains); 
echo("Completed SQL.".PHP_EOL); 
$uids = $users->fetchAllAssoc("uid"); 
$u = array_keys($uids); 
$chunks = array_chunk($u,100,true); 
foreach($chunks as $c){ 
  echo("Processing Chunk.".PHP_EOL); 
  user_delete_multiple($c); 
}

// However, we want to run this as a Drush command from the CLI.  Here is a concatted version ready to run via Drush:
?>

drush php-eval '$domains = [":1"=>"%legalshield%",":2" => "%stateside%",":3"=>"%legaldefence%",":4"=>"%criticalmass%",":5"=>"%thehangar%",":6"=>"%whatarage%"]; $users = db_query("SELECT uid FROM {users} WHERE (status=0 AND access=0 AND login=0) AND (mail NOT LIKE :1 AND mail NOT LIKE :2 AND mail NOT LIKE :3 AND mail NOT LIKE :4 AND mail NOT LIKE :5 AND mail NOT LIKE :6) AND (uid > 1)", $domains); echo("Completed SQL.".PHP_EOL); $uids = $users->fetchAllAssoc("uid"); $u=array_keys($uids); $chunks = array_chunk($u,100,true); foreach($chunks as $c){ echo("Processing Chunk.".PHP_EOL); user_delete_multiple($c); }'