Home>Article>Backend Development> How to add one day timestamp in php
Two ways to add: 1. Directly use the strtotime() function to calculate the time interval, and the date after the interval can be returned in UNIX timestamp format, with the syntax "strtotime(" 1 day")"; 2. Use the time() function to calculate the current timestamp, and add the number of seconds in a day to the current timestamp. The syntax is "time() (1 * 24 * 3600)".
The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer
There are two ways to add a one-day timestamp to php Method:
Directly use the strtotime() function
Use time() to calculate the number of seconds in a day
Method 1: Use strtotime() function
Sometimes we need to add or subtract a certain time interval to a date. You can use strtotime() to calculate some date time intervals and return the interval dates in UNIX timestamp format.
strtotime() function has two uses: one is to parse the date and time in the form of a string and described in English text into a UNIX timestamp, and the other is to calculate some date and time interval.
Example:
"; echo "格式化后：".date("Y-m-d H:i:s",strtotime("now"))."
"; echo "增加一天的时间戳为：".strtotime("+1 day")."
"; echo "格式化后：".date("Y-m-d H:i:s",strtotime("+1 day")); ?>
Method 2: Use time() to calculate the number of seconds in a day
The time() function returns the current time in seconds since the Unix epoch (January 1 1970 00:00:00 GMT).
time() Use the interval seconds to get the timestamp several days after the current timestamp. Because this article seeks the timestamp one day later, the interval seconds can be the number of seconds in a day.
Calculation method of seconds in a day:
1 * 24 * 3600
Example:
"; echo "格式化当后：".date("Y-m-d H:i:s",time())."
"; $interval = 1 * 24 * 3600; echo "增加一天的时间戳为：".(time()+$interval)."
"; echo "格式化当后：".date("Y-m-d H:i:s",time()+$interval)."
"; ?>
Extended knowledge: date() function
date() function formats the local date and time and returns the formatted date string.
Syntax
date(format,timestamp);
Returns the string generated by converting the integer timestamp according to the given format string. If no timestamp is given, the local current time is used. In other words, timestamp is optional and the default value is time().
| Parameters | Description |
|---|---|
| format | Required. Specifies the format of the output date string. The following characters are available:
Also, you can also use the following predefined constants (available starting from PHP 5.1.0):
|
| timestamp | Optional. Specifies an integer Unix timestamp. The default is the current local time (time()). |
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