PHP calculates how many minutes ago it was from the current time

When developing a website or application, it is often necessary to calculate the time difference. For example, in a social network, we need to show how long ago a user posted a status update. At this time, PHP provides a very convenient function time() and strtotime().

1. time() function
   The time() function returns the timestamp of the current date and time in seconds. The timestamp is an integer that represents the number of seconds since 00:00:00 on January 1, 1970.

echo time(); // Output the current timestamp
?>

2. strtotime() function
   strtotime () function converts any date represented in human-readable date and time format to a Unix timestamp. The syntax of this function is as follows:

strtotime ( string $time [, int $now = time() ] ) : int
In this function:

$time is The string to be converted to a Unix timestamp must be in one of the following formats:

yyyy-mm-dd
dd/mm/yyyy
mm/dd/yyyy
yyyy-mm -dd hh:ii:ss
dd/mm/yyyy hh:ii:ss
mm/dd/yyyy hh:ii:ss
now is an optional parameter, and the default value is returned by the time() function timestamp. If this parameter is provided, the timestamp will be set to the specified value.

echo strtotime("now"), "
"; // Output the current timestamp
echo strtotime("24 September 2021"), "
"; // Output the timestamp of September 24, 2021
?>

Through the time() function and strtotime() function, we can calculate the number of minutes, hours, and days from the current time , Zhou et al. Here is a sample code that subtracts the time the user posted the status from the current time, gets the time difference, and converts the time difference to minutes.

// The time when the user posted the status
$post_time = "2021-09-24 10:00:00";
// Convert the string to Unix Timestamp
$post_time_stamp = strtotime($post_time);
// Get the timestamp of the current time
$current_time_stamp = time();
// Calculate the time difference in seconds
$ time_diff = $current_time_stamp - $post_time_stamp;
//Convert to minutes
$time_diff_minutes = round($time_diff / 60);
echo "{$time_diff_minutes} minutes ago from the current time";
? >

In the above code, the time string is converted into a Unix timestamp through the strtotime() function. Then get the timestamp of the current time through the time() function. Calculate the time difference, convert the time difference to minutes, and round to the nearest minute using the round() function.

This article introduces how to use PHP to calculate how long it is since the current time, including methods for calculating the time difference and how to convert the time difference into minutes. In actual development, modifications and adjustments can be made as needed.

The above is the detailed content of PHP calculates how many minutes ago it was from the current time. For more information, please follow other related articles on the PHP Chinese website!