PHP根据生日计算年龄

[php]代码库

function age($date){ 
    $year_diff = ''; 
    $time = strtotime($date); 
    if(FALSE === $time){ 
        return ''; 
    } 
 
    $date = date('Y-m-d', $time); 
    list($year,$month,$day) = explode("-",$date); 
    $year_diff = date("Y") – $year; 
    $month_diff = date("m") – $month; 
    $day_diff = date("d") – $day; 
    if ($day_diff < 0 || $month_diff < 0) $year_diff–; 
 
    return $year_diff; 
}