<!--
name: "Data: Streaming reference — PHP"
description: "PHP streaming reference including streaming events and handling content block deltas (requires SDK v0.5.0+)"
ccVersion: "2.1.246"
-->
# Streaming - PHP

## Streaming

> **Requires SDK v0.5.0+.** v0.4.0 and earlier used a single `$params` array; calling with named parameters throws `Unknown named parameter $model`. Upgrade: `composer require "anthropic-ai/sdk:^0.7"`

```php
use Anthropic\Messages\RawContentBlockDeltaEvent;
use Anthropic\Messages\TextDelta;

$stream = $client->messages->createStream(
    model: '{{OPUS_ID}}',
    maxTokens: 64000,
    messages: [
        ['role' => 'user', 'content' => 'Write a haiku'],
    ],
);

foreach ($stream as $event) {
    if ($event instanceof RawContentBlockDeltaEvent && $event->delta instanceof TextDelta) {
        echo $event->delta->text;
    }
}
```

---