What does php timestamp mean?

The timestamp refers to the total number of milliseconds from 00:00:00 on January 1, 1970 Greenwich Time (08:00:00 on January 1, 1970, Beijing time) to the present.

#In layman's terms, a timestamp is a piece of complete and verifiable data that can represent the existence of a piece of data at a specific point in time.

It is mainly proposed to provide users with an electronic evidence to prove the time when certain user data was generated.

The method of obtaining timestamp in php is: time();Date(); (Recommended learning: PHP programming from entry to master)

$date = date('Y-m-d',time());//今日"2017-11-25"

//php获取今日开始时间戳和结束时间戳
$start = mktime(0, 0, 0, date('m'), date('d'), date('Y'));
$end = mktime(0, 0, 0, date('m'), date('d') + 1, date('Y')) - 1;
将英文文本日期时间解析为 Unix 时间戳：
echo(strtotime("now") . "<br>");
echo(strtotime("15 October 1980") . "<br>");
echo(strtotime("+5 hours") . "<br>");
echo(strtotime("+1 week") . "<br>");
echo(strtotime("+1 week 3 days 7 hours 5 seconds") . "<br>");
echo(strtotime("next Monday") . "<br>");
echo(strtotime("last Sunday"));

The function used to convert UNIX timestamp to date: date()

一般形式：date('Y-m-d H:i:s', 1156219870);

The function used to convert date to UNIX timestamp: strtotime()

一般形式：strtotime('2010-03-24 08:15:42');

time();The function returns the current timestamp (returns the number of seconds since the Unix epoch (00:00:00, January 1, 1970, Greenwich Mean Time) to the current time. )

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