PHP: Get True Random Number

/**
 * Get True Random Number
 * Returns a true random number from RANDOM.ORG's integer http interface. Requires cURL.
 * @author Bo Allen
 * @return Int random number on success, String error or message on failure
 * @param Int $min minimum number
 * @param Int $max maximum number
 */
function get_true_random_number($min, $max) {

	// validate parameters
	if (!is_numeric($min)) {
		$min = 1;
	}
	if (!is_numeric($max)) {
		$max = 10;
	}
	
	// curl options
    $options = array(
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HEADER => false,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_ENCODING => "",
        CURLOPT_USERAGENT => "PHP",
        CURLOPT_AUTOREFERER => true,
        CURLOPT_CONNECTTIMEOUT => 120,
        CURLOPT_TIMEOUT => 120,
        CURLOPT_MAXREDIRS => 10,
    );
	
	// curl init & run
    $ch = curl_init('http://www.random.org/integers/?num=1&min='.$min.'&max='.$max.'&col=1&base=10&format=plain&rnd=new');
    curl_setopt_array($ch, $options);
    $content = curl_exec($ch);
    curl_close($ch);

    return trim($content);
}