Bing Wallpaper

bing.php

#!/usr/bin/env php
<?php

function getDownloadPathWindows()
{
    $home = getenv('HOMEDRIVE') . getenv('HOMEPATH');
    if (!is_dir($home)) {
        throw new RuntimeException("No home folder $home");
    }
    return "$home/Pictures/Bing";
}

function getDownloadPath()
{
    $os = strtoupper(php_uname('s'));
    if (strpos($os, 'WINDOWS') === 0) {
        return getDownloadPathWindows();
    }
    throw new RuntimeException("Unknown operating system $os");
}

$market = 'en-US';
$resolution = '1920x1080';
$image_filename = 'wallpaper.jpg';
$download_directory = getDownloadPath();
$download_path = "$download_directory/$image_filename";
$bing_url = 'http://bing.com';
$json_url = "{$bing_url}/HPImageArchive.aspx?format=js&idx=0&n=1&mkt=$market";

if (!is_dir($download_directory)) {
    @mkdir($download_directory, 0755, true);
}

$json = file_get_contents($json_url);
if ($json === false) {
    throw new RuntimeException("Failed downloading $json_url");
}
$data = json_decode($json);
if ($data === null) {
    throw new RuntimeException('Failed decoding json');
}

$path = &$data->images[0]->urlbase;
if ($path === null) {
    throw new RuntimeException("Found no image in $data");
}

$url = "${bing_url}{$path}_{$resolution}.jpg";

$handle = fopen($url, 'r');
if ($handle === false) {
    throw new RuntimeException("Could not downland $url");
}

$bytes = file_put_contents($download_path, $handle);
if ($bytes === false) {
    throw new RuntimeException("Failed writing to file $download_path");
}