- file_get_contents: documentation ( source)
- json_decode: documentation ( source)
<?php
$json_url = "http://map.freifunk-3laendereck.net/data/alfred_merged.json";
$json = file_get_contents($json_url);
// Convert JSON string to Array
$data = json_decode($json, true);
// print_r($data);
echo $data[0]["addresses"];