You can install this plugin into your application using composer:
composer require fawno/face-relations @stable
use Fawno\FaceRelations\apiRelations;
// Check NIF
$nif = 'S3100015A';
$result = apiRelations::nif_validation($nif) ? 'Valid' : 'Invalid';
// Get relations by NIF (CIF)
var_dump(apiRelations::query(['cif' => 'ESS3100015A']));
// Get relations by OC
var_dump(apiRelations::query(['oc' => 'GE0001267']));
// Get relations by OG
var_dump(apiRelations::query(['og' => 'A15002920']));
// Get relations by UT
var_dump(apiRelations::query(['ut' => 'A15007700']));
// Get relations by NIF, OC, OG and UT
var_dump(apiRelations::query(['cif' => 'S3100015A', 'oc' => 'GE0001267', 'og' => 'A15002920', 'ut' => 'A15007701']));