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How to implement timestamp in PHP and only take the time
- PHPzOriginal
- 2023-03-29 11:31:38675browse
In PHP, a time stamp refers to an integer representing the number of seconds from a fixed point in time to the current moment. Timestamp is widely used in PHP development and is a very common data type. In some applications that require precise time control, we often need to take only the time part and exclude the date part. This article will introduce how to implement a time-only method based on PHP timestamps.
In PHP, we can use the date function to format timestamps. date()The function requires two parameters: a time format string, and a timestamp. This timestamp must be a number of seconds elapsed since January 1, 1970 00:00:00 UTC (also known as a unix timestamp). The following is an example:
$time = time();
echo date('Y-m-d H:i:s', $time);
This code will output the year, month, day, hours, minutes and seconds of the current time.
Now, we want to get only the time part, we can modify the format string to achieve our goal. Specifically, we need to keep the H:i:s part and remove the Y-m-d part:
$time = time();
echo date('H:i:s', $time);
This code will output the hours, minutes and seconds of the current time. .
If we don’t want to use the date function, we can also use other PHP built-in functions to achieve the effect of only taking the time part. For example, by subtracting the timestamp of the current date from the current timestamp, you can get a timestamp containing only the time part:
$now = time();
$today = strtotime('today');
$time = $now - $today;
echo date("H:i:s", $time);
In this code, we call the strtotime function to Convert the string "today" to a timestamp, and then subtract the resulting timestamp from the current timestamp to get a timestamp containing only the time part. Finally, we use the date function to format the timestamp and output the hours, minutes and seconds.
To summarize, to get only the time part of the PHP timestamp, we can use the date function and the corresponding time format string to output the specified part, or by calculating the current timestamp and Get the timestamp containing only the time part from the difference between the timestamps at zero o'clock on the day. No matter which method is used, it is very simple and easy to understand, and is very suitable for PHP beginners to learn and apply.
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