How many digits are timestamps in php

The timestamp refers to the number of seconds from 0:00:00 on January 1, 1970 to the present. In PHP, you can obtain the current system timestamp through the time() function, or convert a time string into a timestamp through the strtotime() function. So, how many digits is the PHP timestamp?

PHP timestamp is a 10-digit integer used to represent the number of seconds from 0:00:00 on January 1, 1970 to the current time. Specifically, the maximum value it can save is 3:14:7 on January 19, 2038, and the corresponding timestamp is 2147483647. This is due to the limitations of 32-bit systems. And 64-bit systems can save larger timestamps.

In PHP, use the date() function to convert the timestamp into an easy-to-read date format, for example:

$timestamp = time();
echo date('Y年m月d日 H:i:s', $timestamp);

Output result:

2021年12月21日 14:30:00

In addition, PHP also Provides some commonly used timestamp processing functions, such as:

• strtotime(): converts a time string into a timestamp;
• mktime(): based on the incoming year and month Parameters such as day, hour, minute, and second generate corresponding timestamps;
• time(): Returns the current timestamp.

To sum up, the PHP timestamp is a 10-digit integer, used to represent the number of seconds from 0:00:00 on January 1, 1970 to the current time. In actual development, we can easily convert and calculate timestamps through various timestamp processing functions, which facilitates us to perform various time-related operations.

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