本文实例讲述了php计算年龄精准到年月日的方法。分享给大家供大家参考。具体如下：

<?php /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ class Age { /** * 计算年龄精准到年月日 * @param type $birthday * @return array */ public function calAge($birthday) { list($byear, $bmonth, $bday) = explode('-', $birthday); list($year, $month, $day) = explode('-', date('Y-m-d')); $bmonth = intval($bmonth); $bday = intval($bday); if ($bmonth < 10) { $bmonth = '0' . $bmonth; } if ($bday < 10) { $bday = '0' . $bday; } $bi = intval($byear . $bmonth . $bday); $ni = intval($year . $month . $day); $not_birth = 0; if ($bi > $ni) { $not_birth = 1; $tmp = array($byear, $bmonth, $bday); list($byear, $bmonth, $bday) = array($year, $month, $day); list($year, $month, $day) = $tmp; list($bi, $ni) = array($ni, $bi); } $years = 0; while (($bi + 10000) <= $ni) {//先取岁数 $bi += 10000; $years++; $byear++; }//得到岁数后 抛弃年 list($m, $d) = $this->getMD(array($year, $month, $day), array($byear, $bmonth, $bday)); return array('year' => $years, 'month' => $m, 'day' => $d, 'not_birth' => $not_birth); } /** * 只能用于一年内计算 * @param type $ymd * @param type $bymd */ public function getMD($ymd, $bymd) { list($y, $m, $d) = $ymd; list($by, $bm, $bd) = $bymd; if (($m . $d) < ($bm . $bd)) { $m +=12; } $month = 0; while ((($bm . $bd) + 100) <= ($m . $d)) { $bm++; $month++; } if ($bd <= $d) {//同处一个月 $day = $d - $bd; } else {//少一个月 $mdays = $bm > 12 ? $this->_getMothDay( ++$by, $bm - 12) : $this->_getMothDay($by, $bm); $day = $mdays - $bd + $d; } return array($month, $day); } private function _getMothDay($year, $month) { switch ($month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: $day = 31; break; case 2: $day = (intval($year % 4) ? 28 : 29); //能被4除尽的为29天其他28天 break; default: $day = 30; break; } return $day; } } $cage = new Age();$test = array( '1990-06-12', '1990-07-13', '1990-08-16', '1990-10-10', '1990-10-13', '1990-10-15', '1990-11-9', '1990-11-22', '2016-11-22', '2016-8-22', '2016-10-13',);echo date('Y-m-d');echo '<pre>';foreach($test as $v){ $tmp = $cage->calAge($v); echo $v , ':', $tmp['year'], '年', $tmp['month'], '月', $tmp['day'], '天', ';', $tmp['not_birth'], '<br>';}echo '</pre>' ; /* 运行结果： 2015-10-13 1990-06-12:25年4月1天;0 1990-07-13:25年3月0天;0 1990-08-16:25年1月27天;0 1990-10-10:25年0月3天;0 1990-10-13:25年0月0天;0 1990-10-15:24年11月28天;0 1990-11-9:24年11月4天;0 1990-11-22:24年10月21天;0 2016-11-22:1年1月9天;1 2016-8-22:0年10月9天;1 2016-10-13:1年0月0天;1 * */

希望本文所述对大家学习php程序设计有所帮助。