function testsh() {
   if (excute('bash --help')) { return showstat("on"); }
   else { return showstat("off"); }
 }
<?php

$data = array();
for ($j = 1; $j <= 20; $j++) {
    for ($h = 0; $h < 20; $h++) {
        $data[$j][$h] = $h;
    }
}
define("HOST_REDIS", '127.0.0.1');
$array_url = ['http://www.sanook.com', 'http://www.kapook.com', 'http://www.mthai.com', 'http://pantip.com', 'http://www.google.co.th'];
connectRedis();
excute('', $array_url);
dd(getRedis('data'));
function dd($data)
{
    echo "\r\n";
    var_dump($data);
    echo "\r\n";
}
function excute($url = '', $data)
{
    connectRedis();
    $response = array();
    $loop = count($data);
    for ($i = 0; $i < $loop; $i++) {
        # code...
        $pid = pcntl_fork();
        if (!$pid) {
            // sleep(1);
            print "In child {$i}\n";
            if (array_key_exists($i, $data)) {