# ExperimentMetadata

Learn how to read the experiment that served the content.

The running experiment that served the content, available [in the experience metadata](/reference/sdk/php/api/response/experience-metadata/get-experiment).

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Use the summary below to quickly jump to a specific topic:

- [Constructor](/reference/sdk/php/api/response/experiment-metadata/construct): Learn how to initialize experiment metadata directly.
- [getExperimentId](/reference/sdk/php/api/response/experiment-metadata/get-experiment-id): Learn how to read the ID of the experiment.
- [getVariantId](/reference/sdk/php/api/response/experiment-metadata/get-variant-id): Learn how to read the ID of the served variant.