/**
* @uses 根据生日计算年龄,生日的格式是:2016-09-23
* @param string $birthday
* @return string|number
*/
function calcAge($birthday)
{
$iage = 0;
if (!empty($birthday)) {
$year = date('Y', strtotime($birthday));
$month = date('m', strtotime($birthday));
$day = date('d', strtotime($birthday));
$now_year = date('Y');
$now_month = date('m');
$now_day = date('d');
if ($now_year > $year) {
$iage = $now_year - $year - 1;
if ($now_month > $month) {
$iage++;
} else if ($now_month == $month) {
if ($now_day >= $day) {
$iage++;
}
}
}
}
return $iage;
}