Add minutes to specified time in php

During the PHP development process, we often encounter scenarios that require time manipulation. Among them, sometimes it is necessary to add a certain number of minutes to a time in order to obtain a certain future or past time point. This article will introduce how to specify time increment minutes in PHP, as well as implementation methods and precautions.

1. How to add minutes to a specified time

In PHP, you can use a variety of methods to add minutes to a specified time. Several of the commonly used methods are listed below.

1. Use the date() function

The date() function is one of the functions used to format dates and times in PHP. Its format is:

date( format, timestamp)

Among them, the format parameter represents the format string of the date and time, and the timestamp parameter represents the timestamp that needs to be formatted. You can use the strtotime() function to convert a normal datetime format string into a timestamp. The specific usage is as follows:

$timestamp=strtotime('2021-10-15 10:20:00');
$new_timestamp=$timestamp 10*60;
$new_time=date( 'Y-m-d H:i:s',$new_timestamp);
echo $new_time;

In the above code, first use the strtotime() function to convert the string '2021-10-15 10:20 :00' to a timestamp $timestamp, then add 10 minutes to it (i.e. 10*60 seconds), and format it into a new date-time format string $new_time.

2. Use the DateTime() class

The DateTime() class is one of the classes used to encapsulate date and time information in PHP. Its constructor can accept a date and time format string or A timestamp as input parameter. If you use a date and time format string, it needs to be formatted into 'Y-m-d H:i:s' format in order to be correctly parsed by the DateTime() class. The usage method is as follows:

$date=new DateTime('2021-10-15 10:20:00');
$date->add(new DateInterval('PT10M'));
$new_time=$date->format('Y-m-d H:i:s');
echo $new_time;

In the above code, first use the DateTime() class to convert the string '2021-10-15 10:20:00' is parsed into a date and time object $date, then 10 minutes are added to it using the add() method, and formatted into a new date and time using the format() method Format string $new_time.

3. Use the combination of strtotime() function and date() function

In addition to the above two methods, you can also use the combination of strtotime() function and date() function to realize the specified time Add minutes of operation. The specific usage is as follows:

$time=date('Y-m-d H:i:s',strtotime(" 10 minutes",strtotime('2021-10-15 10:20:00')));
echo $time;

In the above code, first use the strtotime() function to parse the string '2021-10-15 10:20:00' into a timestamp, and then use strtotime( ) function adds 10 minutes to it and uses the date() function to format it into a new date-time format string $time.

2. Notes

When performing time operations, you need to pay attention to the following points:

1. Time zone issue: The default time zone used in PHP is UTC time, and Not local time. If you need to use local time, you need to set the time zone in the PHP script by setting the date_default_timezone_set() function. For example, when using the East Eighth District time zone in China, you can use the following code:

date_default_timezone_set('Asia/Shanghai');

2. Time format issue: When using date and time strings or objects When performing time operations, you need to ensure that they are formatted correctly to avoid unexpected errors. In particular, when using the date() function, you need to pay attention to the correctness of its date and time format string.

3. Clock rollback problem: Special caution is required when performing time operations that span clock rollback time points. If the time is manipulated while the clock is set back, time errors may occur. At this time, you should use the DateTime() class instead of using the timestamp and date() function.

3. Summary

This article introduces the methods and precautions for adding minutes to the specified time in PHP. Typically, such operations can be accomplished using the date() function, the DateTime() class, or a combination of the strtotime() function and the date() function. However, when using it, you need to pay attention to issues such as time zone and time format to avoid errors.

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