A brief analysis of how to convert php timestamp to seconds

When developing website applications, it is often necessary to manipulate timestamps. The timestamp is an integer representing the number of seconds since 0:00:00 on January 1, 1970. In PHP, we can use the time() function to get the timestamp of the current time. However, sometimes we need to convert the timestamp into a normal time format, using the date() function. Sometimes we also need to convert timestamps into seconds. Some methods will be introduced below.

1. Use the intval() function

The intval() function can force the timestamp to an integer to realize the function of converting the timestamp into seconds.

$time = 1499051740;
$seconds = intval($time);
echo $seconds; // 输出 1499051740

2. Using the mod operator

Another way to convert a timestamp to seconds is to use the mod operator. Because 1 second equals 1000 milliseconds, divide the timestamp by 1000 and take the remainder to get the number of seconds.

$time = 1499051740;
$seconds = $time % 1000;
echo $seconds; // 输出 740

This method can also be used to obtain milliseconds.

3. Use date() and strtotime() functions

The date() function can format the timestamp into a normal time format, such as "Y-m-d H:i: s". The strtotime() function can convert a time string into a timestamp. We can convert the timestamp to a time string first, and then convert the time string to seconds.

$time = 1499051740;
$time_str = date("Y-m-d H:i:s", $time);
$seconds = strtotime($time_str);
echo $seconds; // 输出 1499051740

Although this method is more troublesome, it can achieve more complex time conversion, such as converting timestamps to specific time formats, such as "m/d/Y".

Summary

The above is how to convert PHP timestamp to seconds. int_val() and the mod operator are simpler methods suitable for simple time conversions. Using the date() and strtotime() functions can achieve more complex time conversion, which is suitable for situations where a specific time format is required. Developers can choose the appropriate method according to actual needs.

The above is the detailed content of A brief analysis of how to convert php timestamp to seconds. For more information, please follow other related articles on the PHP Chinese website!