help convert this to php oauth

[Oghenez]

how can i translate this to php

curl https://api.signable.co.uk/v1/envelopes \

-u d41d8cd98f00b204e9800998ecf8427e:x \

-X POST \

-d "envelope_title=My envelope" \

-d 'envelope_documents=[{"document_title": "Test Document Title","document_url": "http://assets.signable.co.uk/SampleDoc.pdf"}]' \

-d 'envelope_parties=[{"party_name": "John Smith","party_email": "jo...@smith.com","party_role":"signer1","party_message":"Please sign this!"}]'

thanks