Examples

Columns

Description

rename_style() rewrites every column name into one convention, here SNAKE, without naming any of them individually.

Documentation

Column operations rewrite the schema, and the rows follow it.

Rename
Select and Drop
Data Manipulation

Code

<?php

declare(strict_types=1);

use function Flow\ETL\DSL\{data_frame, from_array, rename_style, to_output};
use Flow\ETL\String\StringStyles;

require __DIR__ . '/vendor/autoload.php';

data_frame()
    ->read(from_array([
        ['userId' => 1, 'firstName' => 'Norbert', 'lastName' => 'Orzechowicz'],
        ['userId' => 2, 'firstName' => 'John', 'lastName' => 'Doe'],
    ]))
    ->renameEach(rename_style(StringStyles::SNAKE))
    ->collect()
    ->write(to_output(truncate: false))
    ->run();

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