PHP date addition and subtraction operation implementation code

In PHP, you can get another date by adding or subtracting a few days to a certain date. We will use two examples to illustrate. One is strtotime and mktime to convert the time into a timestamp and then process it. Students in need can take a look. .

The following example: get the date one day before 2012-5-1

The code is as follows

代码如下	复制代码
//将时间点转换为时间戳 $date = strtotime('2012-5-1'); //输出一天前的日期，在时间戳上减去一天的秒数 echo date('Y-m-d',$date - 12460*60); ?>

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//Convert time point to timestamp

$date = strtotime('2012-5-1');

//Output the date one day ago, subtract the number of seconds of the day from the timestamp

代码如下

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$Date_1=”2008-8-15″;//格式也可以是:$Date_1=”2003-6-25 23:29:14″;

$Date_2=”2009-10-1″;

$Date_List_a1=explode(“-”,$Date_1);

$Date_List_a2=explode(“-”,$Date_2);

$d1=mktime(0,0,0,$Date_List_a1[1],$Date_List_a1[2],$Date_List_a1[0]);

$d2=mktime(0,0,0,$Date_List_a2[1],$Date_List_a2[2],$Date_List_a2[0]);

$Days=round(($d1-$d2)/3600/24);

Echo “两日期之前相差有$Days 天”;
?>

echo date('Y-m-d',$date - 1*24*60*60);

代码如下	复制代码

Output: 2012-4-30

In addition, the time() function gets the timestamp of the current date!

Look at another example

The code is as follows

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$Date_1="2008-8-15″;//The format can also be: $Date_1="2003-6-25 23:29:14″;

$Date_2=”2009-10-1″;

$Date_List_a1=explode(“-”,$Date_1);

$Date_List_a2=explode(“-”,$Date_2);

$d1=mktime(0,0,0,$Date_List_a1[1],$Date_List_a1[2],$Date_List_a1[0]);

$d2=mktime(0,0,0,$Date_List_a2[1],$Date_List_a2[2],$Date_List_a2[0]);

$Days=round(($d1-$d2)/3600/24);

Echo “The difference between the two dates is $Days days”;

Some time reference

The code is as follows

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Display format: year-month-day hour:minute:mm Relevant time parameters: a – “am” or “pm” A – “AM” or “PM” d – day, two digits, if there are less than two digits, add zero in front; for example: “01″ to “31″ D – Day of the week, three English letters; such as: “Fri” F – month, full English name; such as: “January” h – hour in 12-hour format; e.g.: “01″ to “12″ H – Hour in 24-hour clock; e.g.: “00″ to “23″ g – hour in 12-hour format, no zeros are added if there are less than two digits; for example: “1″ to 12″ G – hour in 24-hour format, no zeros are added if there are less than two digits; for example: “0″ to “23″ i – minutes; e.g.: “00″ to “59″ j – day, two digits, if there are less than two digits, do not add zeros; for example: “1″ to “31″ l – day of the week, full English name; such as: “Friday” m – month, two digits, if there are less than two digits, add zeros in front; for example: “01″ to “12″ n – month, two digits, if there are less than two digits, no zero will be added; for example: “1″ to “12″ M – month, three English letters; such as: “Jan” s – seconds; such as: “00″ to “59″ S – add an English ordinal number at the end of the word, two English letters; such as: “th”, “nd” t – The number of days in the specified month; such as: “28″ to “31″ U – Total seconds w – Numeric day of the week, such as: “0″ (Sunday) to “6″ (Saturday) Y – year, four digits; such as: “1999″ y – year, two digits; such as: “99″ z – day of the year; e.g.: “0″ to “365″ You can freely set the displayed content, connection symbols or display position, such as date(“m-d H”) or date(“dmY”);?> etc.

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source：php.cn

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PHP date addition and subtraction operation implementation code_PHP tutorial