seria isso:
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://api-pix-h.gerencianet.com.br/v2/cob/$id",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'PUT',
CURLOPT_POSTFIELDS =>'{
"calendario": {
"expiracao": 3600
},
"devedor": {
"cpf": "02279112312",
"nome": "Maria apareciada monteiro"
},
"valor": {
"original": "10.21"
},
"chave": "",
"solicitacaoPagador": "Mensaldiade Monteiro Sistemas"
}',
CURLOPT_HTTPHEADER => array(
"authorization: {{$autorizacao}}",
"x-client-cert-pem: {{$config["certificado"]}}"
),
));
echo $curl;
$response = curl_exec($curl);
curl_close($curl);
echo $response;
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