foo.php

foo.php

<?php
// plain callback based (think JS callback hell)
asyncRequest("http://httpbin.org/ip", function($data) {
    asyncRequest("http://pieterhordijk.com/report-ip/" . json_decode($data, true)['origin'], function($response) {
        asyncExecute('INSERT INTO responses (result) VALUES (?)', $response['result']);
    });
});

// coroutines (amphp)
$data     = yield asyncRequest("http://httpbin.org/ip", function($data);
$response = yield asyncRequest("http://pieterhordijk.com/report-ip/" . json_decode($data, true)['origin'], function($response);
yield asyncExecute('INSERT INTO responses (result) VALUES (?)', $response['result']);