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The PHP SDK is published on Packagist and the source lives on GitHub. Install it with Composer in Laravel or any other PHP app.

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Installation

composer require neuronsearchlab/sdk-php
If you are using Laravel, this is the standard installation path. Composer pulls the package from Packagist automatically.

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Initialize the client

The SDK uses a Bearer token for authentication. Obtain an access token by exchanging your SDK credentials and pass it when creating the client: 
<?php

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

use NeuronSearchLab\NeuronSDK;

$sdk = new NeuronSDK([
    'baseUrl' => 'https://api.neuronsearchlab.com/v1',
    'accessToken' => '<your_access_token>',
]);

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Configuration options

OptionTypeDefaultDescription
baseUrlstringrequiredAPI base URL
accessTokenstringrequiredBearer token from the auth token endpoint
timeoutMsint10000HTTP request timeout in ms
maxRetriesint2Retry count on 429/5xx/timeouts
collateWindowSecondsfloat3Buffer events for this many seconds before flushing
maxBatchSizeint200Flush immediately when the buffer reaches this size
maxBufferedEventsint5000Drop oldest events beyond this limit
maxEventRetriesint5Retry count for buffered event sends
disableArrayBatchingboolfalseForce single-event sends
propagateRecommendationRequestIdbooltrueAuto-attach request_id from recommendations to subsequent events
sessionIdstring or nullnullOverride the SDK-wide session ID
autoSessionIdbooltrueAuto-generate a session UUID
httpClientcallablecURLCustom HTTP transport for non-cURL environments or tests

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Get recommendations

$result = $sdk->getRecommendations([
    'userId' => 'user-123',
    'contextId' => '101',
    'limit' => 10,
]);

var_dump($result['recommendations']);
Each recommendation includes id, object, item_id, rank, score, and an embedded item object with the metadata you stored. The response also includes a request_id for event attribution. Use search when the user supplies a free-text query and you want ranked catalog items back through the Core API data plane: 
$results = $sdk->search([
    'query' => 'waterproof trail shoes',
    'userId' => 'user-123',
    'contextId' => '101',
    'limit' => 10,
    'filter' => ['category:footwear'],
]);

var_dump($results['data']);
The SDK posts to https://api.neuronsearchlab.com/v1/search, not the console Platform API. Search responses use the same item shape as recommendations and include query, request_id, data, and recommendations.

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Auto-generated sections

Use getAutoRecommendations for paginated, auto-titled recommendation sections: 
$section = $sdk->getAutoRecommendations([
    'userId' => 'user-123',
    'limit' => 5,
    'windowDays' => 7,
]);

if (!empty($section['next_cursor'])) {
    $next = $sdk->getAutoRecommendations([
        'userId' => 'user-123',
        'cursor' => $section['next_cursor'],
    ]);
}

​
Track events

Events provide the feedback loop that powers personalization. The PHP SDK buffers events in memory for the lifetime of the current process. 
$sdk->trackEvent([
    'type' => 'click',
    'userId' => 'user-123',
    'itemId' => '7f3a2c9e',
])->wait();

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How batching works in PHP

1

Buffer events

Events are buffered with a timestamp that maps to occurred_at in the API.
2

Flush at max batch size

The buffer flushes when it reaches maxBatchSize.
3

Force delivery when needed

You can force delivery with flushEvents() or by calling ->wait() on the returned PendingResult.
4

Flush during shutdown

Remaining buffered events are flushed during PHP shutdown.
5

Retry failed sends

Failed sends are retried with exponential backoff.
$pending = $sdk->trackEvent([
    'type' => 'view',
    'userId' => 'user-123',
    'itemId' => '7f3a2c9e',
]);

$pending->wait();

$sdk->flushEvents();

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Request ID propagation

When propagateRecommendationRequestId is enabled, the SDK captures the request_id from getRecommendations() or search() and automatically attaches it to subsequent trackEvent() calls unless you explicitly provide requestId or request_id. 
$recs = $sdk->getRecommendations([
    'userId' => 'user-123',
    'limit' => 5,
]);

$sdk->trackEvent([
    'type' => 'click',
    'userId' => 'user-123',
    'itemId' => $recs['recommendations'][0]['item_id'],
])->wait();

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Manage catalog items

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Create an item

$sdk->upsertItem([
    'itemId' => '7f3a2c9e',
    'name' => 'Nike Running Shoes',
    'description' => 'High-performance running shoes for daily training.',
    'metadata' => [
        'category' => 'Footwear',
        'brand' => 'Nike',
        'price' => 109.99,
    ],
]);

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Update an item

$sdk->patchItem([
    'itemId' => '7f3a2c9e',
    'active' => false,
]);
Or use the convenience helper: 
$sdk->setItemActive('7f3a2c9e', false);

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Delete items

$sdk->deleteItems(['itemId' => '7f3a2c9e']);

$sdk->deleteItems([
    ['itemId' => '7f3a2c9e'],
    ['itemId' => 'a8d1b247'],
]);

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Error handling

The SDK exposes SDKHttpError and SDKTimeoutError: 
<?php

use NeuronSearchLab\SDKHttpError;
use NeuronSearchLab\SDKTimeoutError;

try {
    $sdk->getRecommendations(['userId' => 'user-123']);
} catch (SDKHttpError $error) {
    error_log(sprintf('HTTP %d: %s', $error->status, $error->statusText));
} catch (SDKTimeoutError $error) {
    error_log(sprintf('Request timed out after %dms', $error->timeoutMs));
}
Transient errors such as 429s, 5xxs, and timeouts are retried automatically.

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Logging

Configure structured logging for debugging and observability: 
<?php

use function NeuronSearchLab\configureLogger;

configureLogger([
    'level' => 'DEBUG',
    'enableNetworkBodyLogging' => true,
    'enablePerformanceLogging' => true,
]);
Available log levels: TRACE, DEBUG, INFO, WARN, ERROR, FATAL.

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Session management

The SDK auto-generates a session UUID on initialization when autoSessionId is enabled. You can override or read it: 
$sdk->setSessionId('custom-session-id');
var_dump($sdk->getSessionId());