因为一个具体的项目中要用到年龄计算，根据生日计算出当前的年龄。这个精确到天，和腾讯是一样的，大家有需要的可以参考一下
复制代码 代码如下:
<?php
/**
* PHP 年龄计算函数
*
* 参数支持数组传参和标准的 Mysql date 类型传参
* params sample
* --------------------------------------------------
$birthArr = array(
'year' => '2000',
'month' => '11',
'day' => '3'
);
$birthStr = '2000-11-03';
* --------------------------------------------------
* );
* @author IT不倒翁 <itbudaoweng@gmail.com>
* @copyright (c) 2011,2012 Just Use It!
* @link IT不倒翁
* @param string|array $birthday
* @return number $age
*/
function getAge($birthday) {
$age = 0;
$year = $month = $day = 0;
if (is_array($birthday)) {
extract($birthday);
} else {
if (strpos($birthday, '-') !== false) {
list($year, $month, $day) = explode('-', $birthday);
$day = substr($day, 0, 2); //get the first two chars in case of '2000-11-03 12:12:00'
}
}
$age = date('Y') - $year;
if (date('m') < $month || (date('m') == $month && date('d') < $day)) $age--;
return $age;
}
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