Date addition and subtraction operations in php, php addition and subtraction operations_PHP tutorial

Date addition and subtraction operations in php, php addition and subtraction operations

Requirement: Get another date by adding or subtracting a few days to a certain date

1. First obtain the timestamp of the date through strtotime()

2. Obtain the timestamp N days ago, through "current timestamp - number of seconds in N days = timestamp N days ago"

3. Use the date() function to convert the format of the timestamp N days ago

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

<?php<br />//将时间点转换为时间戳<br />$date = strtotime('2012-5-1');<br />//输出一天前的日期，在时间戳上减去一天的秒数<br />echo date('Y-m-d',$date - 1*24*60*60);<br />?>

Output: 2012-4-30

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

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