在PHP中以某种格式在1970年之前的日期中创建Date对象 [英] Create Date object in PHP for dates before 1970 in certain format
问题描述
我有日期巫婆,其格式如22-10-49
一样,已格式化为d-m-y
,我想将其转换为Date对象,以将其保存在mysql数据库中.我尝试:
I have date witch is formatted d-m-y
like 22-10-49
I want to convert it to Date object to save it in my mysql Database. I try :
DateTime::createFromFormat('d-m-y', $mydate , new DateTimeZone('GMT'));
,但结果是2049-10-22
而不是1949-10-22
.我搜索后发现createFromFormat
仅返回1970年之后的日期.但是我不知道该怎么办.
but the result is 2049-10-22
instead of 1949-10-22
. I searched and got that createFromFormat
only returns date after 1970. but I don't know what to do.
P.s:我有22-10-49
,还有其他类似的日期,我无法更改其格式或将其转换为22-10-1949
或任何其他格式.
P.S 2:我正在过生日,我希望22-10-15
是1915年而不是2015年.
P.s: 22-10-49
is what I have, and there are several other dates like this, I cannot change the format of it or convert it to 22-10-1949
or any other formats.
P.S 2 : "I'm working with birthdays and excpect 22-10-15
to be 1915 rather than 2015.
推荐答案
尝试使用此功能.
编辑:首先,我们将两位数字年份转换为4位数字.然后,我们将形成完整的日期并将其传递给函数.
First we will convert two digit year in 4 digit. Then we will form complete date and pass it to function.
$original_date = '22-10-49';
$date_part = explode('-',$original_date);
$baseyear = 1900; // range is 1900-2062
$shortyear = $date_part[2];
$year = 100 + $baseyear + ($shortyear - $baseyear) % 100;
$subdate = substr( $original_date, 0, strrpos( $original_date, '-' ) );
$string = $subdate."-".$year;
echo safe_strtotime($string);
function safe_strtotime($string)
{
if(!preg_match("/\d{4}/", $string, $match)) return null; //year must be in YYYY form
$year = intval($match[0]);//converting the year to integer
if($year >= 1970) return date("Y-m-d", strtotime($string));//the year is after 1970 - no problems even for Windows
if(stristr(PHP_OS, "WIN") && !stristr(PHP_OS, "DARWIN")) //OS seems to be Windows, not Unix nor Mac
{
$diff = 1975 - $year;//calculating the difference between 1975 and the year
$new_year = $year + $diff;//year + diff = new_year will be for sure > 1970
$new_date = date("Y-m-d", strtotime(str_replace($year, $new_year, $string)));//replacing the year with the new_year, try strtotime, rendering the date
return str_replace($new_year, $year, $new_date);//returning the date with the correct year
}
return date("Y-m-d", strtotime($string));//do normal strtotime
}
输出:1949-10-22
Output: 1949-10-22
这篇关于在PHP中以某种格式在1970年之前的日期中创建Date对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!