如何使用Zend_Date對象計算從日期開始的年齡

Question

如何使用Zend_Date對象計算從出生日期開始的年齡？

Answer 1

這裏是另外一種方式來計算年齡。它使用PHP格式。它只是減去年份，然後檢查這個年份的生日是否已經過去。這可以用標準的PHP函數完成，但我決定像你問的那樣使用Zend_Date。

更新回答

Zend_Date::setOptions(array(
     'format_type' => 'php' 
    )); 
    $today   = new Zend_Date(); 
    $dateOfBirth  = new Zend_Date('1979-04-10', 'Y-m-d'); 

    $age    = $today->toString('Y') - $dateOfBirth->toString('Y'); 
    // Edit: Added julian date adjustments for leap years 
    $adjustJulian = strcmp($today->toString('L'), $dateOfBirth->toString('L')); 
    if ($dateOfBirth->toString('m') > 2) { 
     $dateOfBirth->addDay($adjustJulian); 
    } 

    if ($today->toString('z') < $dateOfBirth->toString('z')) { 
     $age--; 
    } 

感謝@maciej-homziuk用於指出以前的答案的閏年限制。我已經更新了這個答案，爲閏年的朱利安日添加了調整。

Answer 2

這是一類設計來計算的Zend日期年齡（見第1篇回覆）： http://forums.zend.com/viewtopic.php?f=69&t=6932

Answer 3

這個職位：how to calculate a difference between two Zend_Date objects, in months

如果我正確地閱讀文檔，有一個爲越來越差沒有實現的功能在兩個日期之間以秒/分鐘/.../月/年計算，所以您需要自己計算它。像這樣的東西會做（如果說不上它需要閏年，DST和這樣的考慮）：

<?php 
$birth = new Zend_Date('1988-25-06');  
$today = new Zend_Date(); 
$diff = $today->sub($birth)->toValue(); 
$age = floor($diff/3600/24/365); 

Answer 4

這是注意做這件事的方式Zend_Date的運算，但似乎很好地工作：

$birthdate = "1975-04-14";<br /> 
$age = floor((time() - strtotime($birthdate))/31556926); 

echo "You are " . $age . " years old today."; 

Answer 5

$today = new Zend_Date(); 
$dateOfBirth = new Zend_Date('1988-25-06'); 
$age = $today->toString('Y') - $dateOfBirth->toString('Y'); 
if ($today->toString('dd') + $today->toString('MM') * 32 < 
    $dateOfBirth->toString('dd') + $dateOfBirth->toString('MM') * 32) 
    $age--; 

Answer 6

我喜歡brady.vitrano的方法非常多，它也是建立我自己的動作助手計算基地但是他的代碼不考慮閏年（如果出生日期是1979-03-09 [普通年]，今天是2012-03-08 [閏年]，他的方法返回33，儘管真實年齡是32） - 這就是它如何延長以在涉及閏年時恢復正確的年齡：

Zend_Date::setOptions(array(
    'format_type' => 'php' 
)); 

$today = new Zend_Date(); 
$dateOfBirth = new Zend_Date($date); 

/*** Considering the leap years if the birth date is on 1st march or later. ***/ 
if ($dateOfBirth->toString('n') > 2) { 
    $birthLeap = $dateOfBirth->toString('L'); 
    $todayLeap = $today->toString('L'); 
} 

$age = $today->toString('Y') - $dateOfBirth->toString('Y'); 

if ($today->toString('z') - $todayLeap < $dateOfBirth->toString('z') - $birthLeap) { 
    $age--; 
} 

這是代碼，如果你想與Zend的默認日期符（而不是PHP的日期符）工作：

$today = new Zend_Date(); 
$dateOfBirth = new Zend_Date($date); 

/*** Considering the leap years if the birth date is on 1st march or later. ***/ 
if ($dateOfBirth->get('M') > 2) { 
    /*** Checking if the birth's year is a leap year. ***/ 
    if ($dateOfBirth->get(Zend_Date::LEAPYEAR)) { 
     $birthLeap = 1; 
    } 

    /*** Checking if today's year is a leap year. ***/ 
    if ($today->get(Zend_Date::LEAPYEAR)) { 
     $todayLeap = 1; 
    } 
} 

$age = $today->get('Y') - $dateOfBirth->get('Y'); 

if ($today->get('D') - $todayLeap < $dateOfBirth->get('D') - $birthLeap) { 
    $age--; 
} 

Answer 7

我建議您使用此功能：

public function getAge($dob) 
{ 
    $today = new Zend_Date(); 
    $dob = new Zend_Date($dob, Tuffle_Date::getDBFormat()); 

    $y = Zend_Date::YEAR; 
    $m = Zend_Date::MONTH; 
    $d = Zend_Date::DAY; 

    $dobCurrentYear = new Zend_Date($today->get($y) . '-' . $dob->get($m) . '-' . $dob->get($d), Tuffle_Date::getDBFormat()); 
    $dobCurrentYear->setYear($today->get('Y')); 

    $age = $today->get($y) - $dob->get($y); 

    if (!$dobCurrentYear->isLater($today)) { 
     $age--; 
    } 

    return $age; 
}