Let’s talk about php timestamp conversion method

In PHP development, we often use timestamps to record time and date. The timestamp is a Unix timestamp, measured in seconds, as the number of seconds that have elapsed since January 1, 1970. It is a common time representation method, and there are many built-in functions in PHP to convert it.

This article will introduce some methods of timestamp conversion in PHP, including converting timestamps into date format, converting date strings into timestamps, obtaining the current time, etc.

1. Convert timestamps into date format

During the development process, we need to convert timestamps into date format to display to users or store in the database. In PHP, you can use the date() function to convert a timestamp into date format. The syntax is as follows:

date ( string $format [, int $timestamp = time() ] )

Among them, the $format parameter specifies the date format, and the $timestamp parameter is optional and represents the timestamp to be converted. The default is the current time. The following are some examples of common date formats:

//将时间戳转换为年月日格式：2021-06-01
echo date("Y-m-d", time());

//将时间戳转换为年月日时分秒格式：2021-06-01 09:30:00
echo date("Y-m-d H:i:s", time());

//将时间戳转换为中文日期格式：2021年6月1日
echo date("Y年n月j日", time());

//将时间戳转换为星期几格式：星期二
echo date("l", time());

2. Convert date strings to timestamps

During the development process, we sometimes need to convert date strings entered by users. Processed for timestamps. In PHP, you can use the strtotime() function to convert a date string into a timestamp. The syntax is as follows:

strtotime(string $time [, int $now = time() ])

Among them, the $time parameter represents the date string to be converted, and the $now parameter is optional and represents the current time. The default is the current time. The following are some common examples:

//将日期字符串转换为时间戳：2021年6月1日转换为时间戳
echo strtotime("2021-06-01");

//将日期字符串转换为时间戳：2021年6月1日 9:30:00转换为时间戳
echo strtotime("2021-06-01 9:30:00");

//将中文日期字符串转换为时间戳：2021年6月1日转换为时间戳
echo strtotime("2021年6月1日");

//将星期字符串转换为时间戳：下周二转化为时间戳
echo strtotime("next tuesday");

3. Get the current time

In PHP development, we often need to get the current time to perform some calculations or displays. You can use the time() function or date() function to get the current time. Here are some common examples:

//获取当前时间戳
echo time();

//获取当前年月日格式的日期
echo date("Y-m-d", time());

//获取当前星期几格式
echo date("l", time());

Summary

In PHP development, timestamp is a very common time representation method, often used to record and calculate dates and times. This article introduces commonly used timestamp conversion methods in PHP, including converting timestamps into date format, converting date strings into timestamps, obtaining the current time, etc. These methods are a very important part of PHP development. Mastering these methods can help us deal with time-related issues more efficiently.

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