PHP-ETL - Operations
Transform - Callback
The callback operation executes a custom PHP function within your ETL chain, useful for complex transformations not covered by built-in operations.
Note: This operation is for programmatic use in PHP; it cannot be configured via YAML due to callback serialization limitations.
Options
- callback: A PHP callable (e.g., a closure, a function name as a string, or an array with a class and method name).
Example
Here’s an example of how to use the callback operation to transform a data item with a custom function:
<?php
use Oliverde8\Component\PhpEtl\ChainBuilder;
use Oliverde8\Component\PhpEtl\ChainOperation\Transformer\CallbackTransformerOperation;
use Oliverde8\Component\PhpEtl\Item\DataItem;
use Oliverde8\Component\PhpEtl\Item\ItemInterface;
use Oliverde8\Component\PhpEtl\Model\ExecutionContext;
$chainBuilder = new ChainBuilder();
$chainBuilder->add(
new CallbackTransformerOperation(
function (ItemInterface $item, ExecutionContext $context) {
$data = $item->getData();
$data['full_name'] = $data['first_name'] . ' ' . $data['last_name'];
return new DataItem($data);
}
)
);
// ...