Sample PHP Curl Forms Submit API

sample.php

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.hsforms.com/submissions/v3/integration/submit/portalId/formGuid',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'Example JSON body: {
    "submittedAt": "1517927174000", 
    "fields": [
        {
            "objectTypeId": "0-1",
            "name": "email",
            "value": "[email protected]"
        },
        {
            "objectTypeId": "0-1",
            "name": "firstname",
            "value": "Jeff"
        }
    ],
    "context": {
        "hutk": ":hutk", 
        "pageUri": "www.example.com/page",
        "pageName": "Example page"
    },
    "legalConsentOptions": {
        "consent": { 
            "consentToProcess": true,
            "text": "I agree to allow Example Company to store and process my personal data.",
            "communications": [
                {
                    "value": true,
                    "subscriptionTypeId": 999,
                    "text": "I agree to receive marketing communications from Example Company."
                }
            ]
        }
    }
}

{
    "fields": [...
    ],
    "legalConsentOptions": {
        "consent": {
            "consentToProcess": true,
            
            "text": "Text that gives consent to process",
            
            "communications": [
                
                {
                    "value": true,
                    
                    "subscriptionTypeId": 999,
                    
                    "text": "Consent to communicate text for subscription type ID 999"
                    
                },
                {
                    "value": true,
                    "subscriptionTypeId": 777,
                    "text": "Consent to communicate text for subscription type ID 777"
                }
            ]
        }
    }
}

{
    "fields": [],
    "legalConsentOptions": {
        "legitimateInterest": {
            "value": true,
            
            "subscriptionTypeId": 999,
            
            "legalBasis": "CUSTOMER",
            
            "text": "Legitimate interest consent text"
            
        }
    }
}',
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;