gistfile1.txt

function generate_get_fonts( $amount = 1000 )
{
	if ( get_transient('generate_get_fonts') )
		return;
		
	$selectDirectory = '';
		
    $selectDirectory = plugin_dir_path( __FILE__ );

    $fontFile = $selectDirectory . '/cache/google-web-fonts.txt';

    //Total time the file will be cached in seconds, set to a week
    $cachetime = 86400 * 7;

    if(file_exists($fontFile) && $cachetime < filemtime($fontFile))
    {
        $content = json_decode(file_get_contents($fontFile));
    } else {

        $googleApi = 'https://www.googleapis.com/webfonts/v1/webfonts?sort=popularity&key=AIzaSyAfzHmLjE4RBF6kSi3KW8ZD-rzhxSJP9C4';

        $fontContent = wp_remote_get( $googleApi, array('sslverify'   => false) );

        $fp = fopen($fontFile, 'w');
        fwrite($fp, $fontContent['body']);
        fclose($fp);

        $content = json_decode($fontContent['body']);
    }
		
	set_transient('generate_get_fonts', $content->items, WEEK_IN_SECONDS);

}