Downloads the .woff2 formats of the specified Google Font for the specified language types. This also creates the appropriate CSS for the downloaded font files

google-font-download-woff2.php

<?php
/**
 * Downloads the .woff2 formats of the specified Google Font for the specified
 * language types. This also creates the appropriate CSS for the downloaded
 * font files
 *
 * Usage:
 * php google-font-download.php 'Open Sans' ['latin-ext,latin' [/path/to/write/to]]
 */

if (empty($argv[1])) {
    echo "You must specify a font to download.\n";
    exit(1);
}

$fontToDownload = $argv[1];
$langsToDownload = ['latin-ext', 'latin'];
$savePath = getcwd();
$fontDirname = strtolower(preg_replace('/[^A-Za-z0-9]/', '-', $fontToDownload));
$cssFilename = $fontDirname . '.css';

if (!empty($argv[2])) {
    $langsToDownload = explode(',', $argv[2]);
}

if (!empty($argv[3])) {
    $savePath = realpath($argv[3]);

    if (!$savePath) {
        echo "The path {$savePath} does not exist.\n";
        exit(1);
    }
}

if (!is_writable($savePath)) {
    echo "Cannot write to {$savePath}.\n";
    exit(1);
}

if (!chdir($savePath)) {
    echo "Unable to change to {$savePath}.\n";
    exit(1);
}

$fontPath = $savePath . DIRECTORY_SEPARATOR . $fontDirname;
if (!file_exists($fontPath) && !mkdir($fontPath)) {
    echo "Unable to create {$fontDirname} in {$savePath}.\n";
    exit(1);
}

// Change to the location where we want to download these files
if (!chdir($fontPath)) {
    echo "Unable to change to {$fontPath}.\n";
    exit(1);
}

$qs = [
    'family' => $fontToDownload . ':100,100i,200,200i,300,300i,400,400i,500,500i,600,600i,700,700i,800,800i,900,900i',
];

$userAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36';
$context = stream_context_create([
    'http' => [
        'method' => 'GET',
        'header' => "User-Agent: {$userAgent}\r\n",
    ],
]);

$googleFontUrl = 'https://fonts.googleapis.com/css?' . http_build_query($qs);
$googleFontCss = @file_get_contents($googleFontUrl, false, $context);

if (!$googleFontCss) {
    echo "Unable to download CSS from Google.\n";
    exit(1);
}

$currentWeight = null;
$currentLang = null;

$lines = explode("\n", $googleFontCss);
$linesToInclude = [];

foreach ($lines as $line) {
    $matches = [];

    // What language is this font?
    if (preg_match('/^\/\* (.*) \*\/$/', $line, $matches) === 1) {
        $currentLang = $matches[1];
    }

    if (!in_array($currentLang, $langsToDownload)) {
        continue;
    }

    // What font-weight are we using?
    if (preg_match('/^  font-weight: (\d{3}).*$/', $line, $matches) === 1) {
        $currentWeight = $matches[1];
    }

    // What is the URL and file name for this font?
    if (preg_match("/^  src: local\(.*\), local\('(.*)'\), url\((.*)\) .*$/", $line, $matches) === 1) {
        $filename = strtolower($matches[1] . '_' . $currentLang . '_' . $currentWeight) . '.woff2';
        $fontDownloadUrl = $matches[2];
        $line = str_replace($fontDownloadUrl, $filename, $line);

        // Download the file to the current directory
        echo "Downloading font file for {$matches[1]}, {$currentWeight}, {$currentLang}.\n";
        $fontContents = @file_get_contents($fontDownloadUrl, false, $context);

        if (!$fontContents) {
            echo "Skipping {$filename}. Unable to download font from {$fontDownloadUrl}.\n";
            continue;
        }

        file_put_contents($filename, $fontContents);
    }

    $linesToInclude[] = $line;
}

file_put_contents($cssFilename, implode("\n", $linesToInclude));

echo "Font files downloaded to {$fontPath} and CSS file created.\n";