Extracts
Read from various data sources.
Transforms
Shape and optimize for your needs.
Loads
Store and secure in one of many available data sinks.
<?php
declare(strict_types=1);
use function Flow\ETL\DSL\{data_frame, from_rows, int_entry, ref, row, rows, to_output, to_stream};
require __DIR__ . '/../../../autoload.php';
data_frame()
->read(from_rows(rows(
row(int_entry('a', 100), int_entry('b', 200))
)))
->write(to_output(false))
->withEntry('c', ref('a')->plus(ref('b')))
->withEntry('d', ref('b')->minus(ref('a')))
->write(to_stream(__DIR__ . '/output.txt', truncate: false))
->run();
Output
+-----+-----+-----+-----+
| a | b | c | d |
+-----+-----+-----+-----+
| 100 | 200 | 300 | 100 |
+-----+-----+-----+-----+
1 rows