Multi curl example

multicurl.php

<?php

/**
 * Multi curl example
 *
 * PHP Version 7.4
 *
 * @category  Example
 * @package   MultiCurl
 * @author    Nhu-Hoai Robert Vo <nhuhoai.vo@nhuvo.ch>
 * @copyright 2021 Nhu-Hoai Robert Vo
 * @license   https://spdx.org/licenses/MIT.html MIT License
 * @version   GIT: 0.1.0
 * @link      https://www.nhuvo.ch/
 * @since     0.1.0
 */
 
/// Set timeout to 2 seconds
$timeout = 2;

/// Requests
$requests = [];

// First request
$requests[0] = curl_init();
curl_setopt_array(
    $requests[0],
    [
      CURLOPT_URL => "https://www.github.com/",
      CURLOPT_TIMEOUT => $timeout,
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_RETURNTRANSFER => true
    ]
);

// Second request
$requests[1] = curl_init();
curl_setopt_array(
    $requests[1],
    [
      CURLOPT_URL => "https://www.google.com/",
      CURLOPT_TIMEOUT => $timeout,
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_RETURNTRANSFER => true
    ]
);

// Third request
$requests[2] = curl_init();
curl_setopt_array(
    $requests[2],
    [
      CURLOPT_URL => "https://www.nhuvo.ch/",
      CURLOPT_TIMEOUT => $timeout,
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_RETURNTRANSFER => true
    ]
);

// Fourth request
$requests[3] = curl_init();
curl_setopt_array(
    $requests[3],
    [
      CURLOPT_URL => "https://fake.address.does.surely.not.exist.com",
      CURLOPT_TIMEOUT => $timeout,
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_RETURNTRANSFER => true
    ]
);

/// Init multi curl
$mh = curl_multi_init();

// Handle all requests into multi curl
foreach ($requests as $request) {
  curl_multi_add_handle($mh, $request);
}

// Waiting until every request has been done
do {
  $status = curl_multi_exec($mh, $active);
  if ($active) {
    curl_multi_select($mh);
  }
} while ($active && $status == CURLM_OK);

// Show status
$count = 1;

$br = "<br />";
if (php_sapi_name() == "cli") {
  $br = "\n";
}

while (($request = curl_multi_info_read($mh)) !== false) {
  print "Request #" . $count . $br;
  print "URL: " . curl_getinfo($request["handle"])["url"] . $br;
  print "Duration: " . curl_getinfo($request["handle"])["total_time"] . "ms" . $br;
  print "Curl error: " . curl_errno($request["handle"]) . $br . $br;
  $count++;
}

// Close multi curl handler
curl_multi_close($mh);