Respostas:
No Drupal 7, você pode buscar todos os usuários usando o entity_load, como a seguir,
$users = entity_load('user');
e array_keys ($ users) fornece a matriz de uid's
Apenas compartilhando um trecho que criei recentemente para obter HTML e EMAIL de todos os usuários existentes no banco de dados.
Funciona bem até mais de 2000 usuários. Depois disso, sugiro implementar lotes ou uma consulta direta direta ao banco de dados.
Isso depende do Drupal carregando cada usuário.
$query = new EntityFieldQuery();
$query->entityCondition('entity_type', 'user');
$html = '<table>';
$result = $query->execute();
$uids = array_keys($result['user']);
// THIS IS YOUR ARRAY OF UIDS.
$users = user_load_multiple($uids);
// EXTRA CODE.
foreach($users as $user){
$mail = $user->mail;
$name = $user->name;
$html .= '<tr><td>'.$mail.'</td>'.'<td>'.$name.'</td></tr>';
}
$html .= '</table'>;
Retornará uma tabela html simples que você pode copiar para se destacar facilmente, etc.
Para obtê-los em uma matriz, basta usar a variável indicada no código para UIDS.
Para responder a alguns dos comentários: Se você estiver trabalhando com um grande número de usuários, não poderá carregar todos os usuários em uma matriz sem tempo limite; portanto, provavelmente será necessário processá-los em lote ...
Aqui está como (sim, é:
function _set_batch_revench_agains_users(){
$batch = [
'operations' => [
['_revench_against_users_batch_process']
],
'finished' => '_revench_against_users_batch_finished',
'title' => t('Punishing users for ungratefulness and general insolence.'),
'init_message' => t('Batch is starting, he he he...'),
'progress_message' => t('Processed @current out of @total.'),
'error_message' => t('Batch has encountered an error, nooooo!'),
'file' => drupal_get_path('module', 'revench_agains_users') . '/user_agains_users.module'
];
batch_set($batch);
batch_process('admin');
}
/**
* Batch 'Processing' callback
*/
function _revench_against_users_batch_process(&$context){
//all this $context stuff is mandatory, it is a bit heavy, but the batchAPI need it to keep track of progresses
if (!isset($context['sandbox']['current'])) {
$context['sandbox']['count'] = 0;
$context['sandbox']['current'] = 0;
}
//don't use entity field query for such simple use cases as gettings all ids (much better performances, less code to write...)
$query = db_select('users', 'u');
$query->addField('u', 'uid');
$query->condition('u.uid', $context['sandbox']['current'], '>');
$query->orderBy('u.uid');
// Get the total amount of items to process.
if (!isset($context['sandbox']['total'])) {
$context['sandbox']['total'] = $query->countQuery()->execute()->fetchField();
// If there are no users to "update", stop immediately.
if (!$context['sandbox']['total']) {
$context['finished'] = 1;
return;
}
}
$query->range(0, 25);
$uids = $query->execute()->fetchCol();
//finaly ! here is your user array, limited to a manageable chunk of 25 users
$users_array = user_load_multiple($uids);
//send it to some function to "process"...
_burn_users_burnburnburn($users_array); // I won't reveal the content of this function for legal reasons
//more mandatory context stuff
$context['sandbox']['count'] += count($uids);
$context['sandbox']['current'] = max($uids);
$context['message'] = t('burned @uid ... feels better ...', array('@uid' => end($uids)));
if ($context['sandbox']['count'] != $context['sandbox']['total']) {
$context['finished'] = $context['sandbox']['count'] / $context['sandbox']['total'];
}
}
/**
* Batch 'finished' callback
*/
function _revench_against_users_batch_finished($success, $results, $operations) {
if ($success) {
// Here we do something meaningful with the results.
$message = t('@count users successfully burned:', array('@count' => count($results)));
drupal_set_message($message);
}
else {
// An error occurred.
// $operations contains the operations that remained unprocessed.
$error_operation = reset($operations);
$message = t('An error occurred while processing %error_operation with arguments: @arguments some users might have escaped !', array('%error_operation' => $error_operation[0], '@arguments' => print_r($error_operation[1], TRUE)));
drupal_set_message($message, 'error');
}
}