ttrss/vendor/open-telemetry/sdk/README.md

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# OpenTelemetry SDK
The OpenTelemetry PHP SDK implements the API, and should be used in conjunction with contributed exporter(s) to generate and export telemetry.
## Documentation
https://opentelemetry.io/docs/instrumentation/php/sdk/
## Getting started
### Manual setup
See https://github.com/open-telemetry/opentelemetry-php/tree/main/examples
### SDK Builder
See https://github.com/open-telemetry/opentelemetry-php/blob/main/examples/sdk_builder.php
### Autoloading
SDK autoloading works with configuration values provided via the environment (or php.ini).
The SDK can be automatically created and registered, if the following conditions are met:
- `OTEL_PHP_AUTOLOAD_ENABLED=true`
- all required [SDK configuration](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/sdk-environment-variables.md#general-sdk-configuration) is provided
SDK autoloading will be attempted as part of composer's autoloader:
```php
require 'vendor/autoload.php';
$tracer = \OpenTelemetry\API\Globals::tracerProvider()->getTracer('example');
$meter = \OpenTelemetry\API\Globals::meterProvider()->getMeter('example');
```
If autoloading was not successful (or partially successful), no-op implementations of the above may be returned.
See https://github.com/open-telemetry/opentelemetry-php/blob/main/examples/autoload_sdk.php for a more detailed example.
## Contributing
This repository is a read-only git subtree split.
To contribute, please see the main [OpenTelemetry PHP monorepo](https://github.com/open-telemetry/opentelemetry-php).