ngrok.php

<?php
function ngrok_fetch($request='',$apiKey='',$method='GET', $postdata=array())
{
	$headers = [
	    'authorization: Bearer ' . $apiKey,
	    'ngrok-version: 2'
	];

	if(empty($postdata) === false)
	{
		$postdata = http_build_query($vars);
	}

	// $apiUrl = 'https://api.ngrok.com/' . $request;
	$apiUrl = 'http://localhost:4040/api/' . $request;

	$ch = curl_init();
	if(empty($postdata) === false)
	{
		if($method === 'POST')
		{
			curl_setopt($ch, CURLOPT_URL, $apiUrl);
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
		}
		else
		{
			curl_setopt($ch, CURLOPT_URL, $apiUrl . "?" . $postdata);
			curl_setopt($ch, CURLOPT_POST, 0);
		}
	}
	else
	{
		curl_setopt($ch, CURLOPT_URL, $apiUrl);
	}
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	$server_output = curl_exec ($ch);

	curl_close ($ch);

	return json_decode($server_output);
}

$apiKey = 'NGROK_TOKEN_HERE'; # Required to access live api (api.ngrok.com)
$response = ngrok_fetch('tunnels', $apiKey);
if(isset($response->tunnels) && is_array($response->tunnels) && count($response->tunnels) > 0)
{
	foreach($response->tunnels as $tunnel)
	{
		if($tunnel->name === 'your_tunnel_name' && $tunnel->proto === 'https')
		{
			echo $tunnel->public_url;
			break;
		}
	}
}