script get smashing magazine monthly wallpaer

get_smashing_magazine_calendar.php

<?php
/**
 * Author: An, Hyeong-woo
 * Email: mytory@gmail.com
 * Blog: http://mytory.net
 * Description: See detail on help message. You can see by running this script without args.
 * Dependencies: Tidy extension.
 */
function cmd_echo($str){
    echo $str . PHP_EOL;
}

if($argc != 5){
    cmd_echo("SYNOPSIS:");
    cmd_echo("\tphp $argv[0] [url or filepath] [downlaod_folder] [resolution] [cal or nocal]");
    cmd_echo("EXAMPLE:");
    cmd_echo("\tphp $argv[0] https://www.smashingmagazine.com/2016/04/desktop-wallpaper-calendars-may-2016/ ~/Downloads/wallpaer/ 1920x1200 cal");
    cmd_echo("\t(You must use alphabet 'x' for resolution.)");
    cmd_echo("\tphp $argv[0] https://www.smashingmagazine.com/2016/04/desktop-wallpaper-calendars-may-2016/ ~/Downloads/wallpaer/ 1920x1200 nocal");
    cmd_echo("\t(If you specify nocal, download wallpaper without calender.)");
    exit(1);
}

$url = $argv[1];
$download_folder = $argv[2];
$resolution = str_replace('x', '×', $argv[3]);
$cal_or_nocal = $argv[4];

if(is_file('./smashing_test_html.html')){
    cmd_echo('Using test file ./smashing_test_html.html.');
    $html = file_get_contents('./smashing_test_html.html');
} else {
    $html = file_get_contents($url);
}
if(!$html){
    cmd_echo("Is URL corrupted? Cannot open URL.");
    exit(1);
}

$tidy_config = array(
   'wrap' => 0,
);

// Tidy
$tidy = new tidy;
$tidy->parseString($html, $tidy_config, 'utf8');
$tidy->cleanRepair();

$html = (string) $tidy;

$pattern = "/<a.* href=\"(?P<url>[^\"]+)\".*>(?P<resolution>{$resolution})<\/a>/";
cmd_echo('regex pattern: ' . $pattern);
preg_match_all($pattern, $html, $matches);
$urls = $matches['url'];
$resolutions = $matches['resolution'];

// validate resolution
foreach($resolutions as $i => $export_resolution){
    if($export_resolution != $resolution){
        cmd_echo("Item $i is not targeted resolution($export_resolution). So removed.");
        unset($resolutions[$i]);
        unset($urls[$i]);
    }
}

// cal or nocal
foreach($urls as $i => $url){
    if(!strstr($url, "-{$cal_or_nocal}-")){
        unset($urls[$i]);
    }
}

// make download folder
if(!is_dir($download_folder)){
    if(!mkdir($download_folder, 0777, true)){
        cmd_echo('Fail to make download folder. Check permission: ' . $download_folder);
        exit(1);
    }
}

// download wallpaper
foreach($urls as $url){
    $filename = pathinfo($url, PATHINFO_BASENAME);
    $target_dir = realpath($download_folder);
    $filepath = $target_dir . DIRECTORY_SEPARATOR . $filename;
    $binary = file_get_contents($url);
    if($binary === false){
        cmd_echo($url . ' has not downloaded bacause error. Check url or network status.');
        continue;
    }
    if(false === file_put_contents($filepath, $binary)){
        cmd_echo($url . ' has not created bacause error. Check directory permission.');
        continue;
    }else{
        cmd_echo("$url downloaded.");
    }
}

cmd_echo('Finish.');