PHP 8 new feature: timestamp types int and float support fractions

New features of PHP 8: Timestamp types int and float support fractions

With the release of PHP 8, one of the most eye-catching new features is time The stamp types int and float support fractions. This new feature will make it easier for developers to handle microsecond-level timestamps, while improving PHP's time processing capabilities, making it more suitable for use in high-precision calculations and time-related applications.

In the past, the timestamp type in PHP was of integer type, representing the number of seconds since 0:00:00 on January 1, 1970. However, since computer processing speeds are getting faster, our applications require higher time precision, such as milliseconds or microseconds. Therefore, PHP 8 introduces fractional support for timestamp types, allowing timestamps to use decimals to represent finer times.

Let’s take a look at the specific implementation. PHP 8 supports defining timestamps as int or float types. When the timestamp is defined as float type, we can add decimals after the decimal point to indicate finer time precision, for example:

<?php
$timestamp = 1633413175.123456;
echo date('Y-m-d H:i:s.u', $timestamp);
// 输出：2021-10-05 13:39:35.123456
?>

The above code uses a timestamp with a decimal point and formats it is the time with microseconds. As we can see, the decimal part in a timestamp is very useful as it provides more precise time information, allowing us to measure time more accurately.

In addition to supporting float type timestamps, PHP 8 also adds some new functions to handle fractional type timestamps. For example, we can use the microtime(true) function to get the microsecond timestamp of the current time, for example:

<?php
$microtime = microtime(true);
echo $microtime;
// 输出：1633413175.123456
?>

Using the microtime(true) function can be very convenient Gets the microsecond timestamp of the current time without additional calculations or formatting.

In short, supporting fractions for timestamp types int and float is one of the most important new features of PHP 8. It enables developers to handle high-precision time operations more easily and improves PHP's time processing capabilities. This new feature will make PHP more suitable for processing time-related applications, such as financial transactions, scientific computing, and game development.

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