Set the Order of Signing Using the PDFfiller PHP Client

How to Use PDFfiller PHP Client

$s2s = new SignatureRequest($provider);
$s2s->document_id = 120833084;

$s2s->method = new SignatureRequestMethod(SignatureRequestMethod::SEND_TO_GROUP);
$s2s->envelope_name = 'group envelope';
$s2s->sign_in_order = true;
//////////
$s2s->security_pin = new SignatureRequestSecurityPin(SignatureRequestSecurityPin::STANDARD);
$s2s->recipients[] = new SignatureRequestRecipient($provider, [
    'email' => 'test@test.com',
    'name' => 'Test user',
    'access' => 'full',
    'require_photo' => false,
    'order' => 1,
    'message_subject' => 'subject',
    'message_text' => 'message',
    'additional_documents' => [
        'doc1'
    ]
]);
$s2s->recipients[] = new SignatureRequestRecipient($provider, [
    'email' => 'test2@test.com',
    'name' => 'Test user 2',
    'access' => 'full',
    'require_photo' => false,
    'order' => 2,
    'message_subject' => 'subject',
    'message_text' => 'message',
    'additional_documents' => [
        'doc1'
    ]
]);
///...20-th recipient
$s2s->recipients[] = new SignatureRequestRecipient($provider, [
    'email' => 'test20@test.com',
    'name' => 'Test user 20',
    'access' => 'full',
    'require_photo' => false,
    'order' => 20,
    'message_subject' => 'subject',
    'message_text' => 'message',
    'additional_documents' => [
        'doc1'
    ]
]);

$result = $s2s->save();