PHP – Cache Google Web Fonts using Api

/** * Get google fonts * * @param  integer $amount - Return a chuck of fonts * * @return Array of fonts */ function get_google_fonts( $amount = 30 ) {     $fontFile = '/fonts/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={API_KEY}';           $ch = curl_init();         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);         curl_setopt($ch, CURLOPT_HEADER, false);         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);         curl_setopt($ch, CURLOPT_URL, $url);         curl_setopt($ch, CURLOPT_REFERER, $googleApi);         curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);         $fontContent = curl_exec($ch);         curl_close($ch);           $fp = fopen($fontFile, 'w');         fwrite($fp, $fontContent);         fclose($fp);           $content = json_decode($fontContent);     }       if($amount == 'all')     {         return $content->items;     } else {         return array_slice($content->items, 0, $amount);     } }