Funcion para generar aleatoriamente matriculas europeas

generarMatricula.php

function generateMatricula() {
                $numbers = '0123456789';
                $characters = 'BCDFGHIJKLMNPQRSTVWXYZ';
                $randomString = '';
                for ($i = 0; $i < 4; $i++) {
                    $randomString .= $numbers[rand(0, strlen($numbers) - 1)];
                }
                for ($i = 0; $i < 3; $i++) {
                    $randomString .= $characters[rand(0, strlen($characters) - 1)];
                }
                return $randomString;
            }