batch_set($batch_definition)
Adds a new batch.
Batch operations are added as new batch sets. Batch sets are used to spread processing (primarily, but not exclusively, forms processing) over several page requests. This helps to ensure that the processing is not interrupted due to PHP timeouts, while users are still able to receive feedback on the progress of the ongoing operations. Combining related operations into distinct batch sets provides clean code independence for each batch set, ensuring