[PHP] Get raw HTTP request

get_raw_http_request.php

<?php

/**
 * Get raw HTTP request.
 *
 * Inspired by:
 *  - https://gist.github.com/magnetikonline/650e30e485c0f91f2f40
 *  - https://www.php.net/manual/en/function.getallheaders.php#104307
 *
 * @return string
 */
function get_raw_http_request() {
  
  // Request line
  $data = sprintf(
    "%s %s %s\r\n",
    $_SERVER["REQUEST_METHOD"],
    $_SERVER["REQUEST_URI"],
    $_SERVER["SERVER_PROTOCOL"]
  );
  
  // Headers
  foreach ($_SERVER as $name => $value) {
    if (substr($name, 0, 5) === "HTTP_") {
      $name = substr($name, 5);
      $name = str_replace("_", " ", $name);
      $name = strtolower($name);
      $name = ucwords($name);
      $name = str_replace(" ", "-", $name);
    } else if ($name === "CONTENT_TYPE") {
      $name = "Content-Type";
    } else if ($name === "CONTENT_LENGTH") {
      $name = "Content-Length";
    } else {
      continue;
    }
    $data .= ($name . ": " . $value . "\r\n");
  }
  
  // Body
  $data .= ("\r\n" . file_get_contents("php://input") . "\r\n");
  
  return $data;
  
}