3v4l.org

run code in 300+ PHP versions simultaneously
<?php $signed_request = 'rs25bODttOJd3JIA8EW7xSA-wDNJGVBqallNSqftfxA.eyJpbnN0YW5jZUlkIjoiMTJlODMwNzAtNmRhNy0yNjU1LWVhNTktODc0MWZjYmQ1MWFkIiwic2lnbkRhdGUiOiIyMDE0LTAyLTA2VDAxOjE0OjI4LjMwNC0wNjowMCIsInVpZCI6IjBhNGZiZjFhLTRkNDMtNDU1ZC1iMzk5LTFkOTA0MTgyZWZjMiIsInBlcm1pc3Npb25zIjoiT1dORVIiLCJpcEFuZFBvcnQiOiIyMTIuMjkuMTkyLjE0LzY1Mjg1IiwidmVuZG9yUHJvZHVjdElkIjoiIiwiZGVtb01vZGUiOmZhbHNlfQ'; list($encoded_sig, $payload) = explode('.', $signed_request, 2);

preferences:
36.89 ms | 402 KiB | 5 Q