Batch 4: batch within a batch.
Operations:
function _batch_test_batch_4() {
// Ensure the batch takes at least two iterations.
$total = 10;
$sleep = 1000000 / $total * 2;
$operations = array();
for ($i = 1; $i <= round($total / 2); $i++) {
$operations[] = array(
'_batch_test_callback_1',
array(
$i,
$sleep,
),
);
}
$operations[] = array(
'_batch_test_nested_batch_callback',
array(),
);
for ($i = round($total / 2) + 1; $i <= $total; $i++) {
$operations[] = array(
'_batch_test_callback_1',
array(
$i,
$sleep,
),
);
}
$batch = array(
'operations' => $operations,
'finished' => '_batch_test_finished_4',
'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
);
return $batch;
}