example.php

<?php
    include "van.php";
        
        class Job implements IJob {

            public function run($params){

                /*  now  "io" is a mysql interface */
                van_link("io", new IoMysql("host", "port", "user", "passwd"));
                van_set_state("io", "connected");
                van_read("io", "select something from db", $something);
                update($something);
                van_write("io", "update $something into db", $something);
                van_set_state("io", "closed");
    
                //van_unlink("io"); // here we will auto unlink whenever no link points to IoMySql obj

                /*  now "io" is a map interface */
                van_link("io", new MapCsv2Arr);
                van_map("io", file_get_contents("example.csv"), $csv_arr);

                van_link("map", "io");
                /*  now "io" is a log file , and the "map" becomes to the map*/
                van_link("io", new IoLogfile("/tmp/log"));
                van_map("map", file_get_contents("example.csv"), $csvarr);
                van_write("io", json_encode($csvarr));
            }
        }

        van_link("job_01", new Job);
        van_run("job_01","some params");
        van_unlink("job_01");