How to convert time format to timestamp in php

How to convert timestamps in php time format: 1. Use the strtotime() function to convert the date represented by the English text string into a timestamp; 2. Use the mktime() function to return a date UNIX timestamp.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

PHP provides functions that can easily combine various The date in the form is converted into a timestamp. This type of function is mainly:

• strtotime(): Parses the date and time description of any English text into a timestamp.

• mktime(): Get timestamp from date.

strtotime()

strtotime() function is used to convert the date represented by the English text string into a timestamp, which is date() The inverse function of , returns the timestamp successfully, otherwise returns FALSE. Syntax:

int strtotime ( string time [, int now] )

• time Required. Specifies a date/time string representing a date according to the GNU date input format.

• now Optional. Specifies the timestamp used to calculate the return value. If this parameter is omitted, the current time is used.

Return value: Returns timestamp if successful, returns FALSE if failed.

Example:

<?php
echo strtotime("2009-10-21 16:00:10"), "<br />";//输出 1256112010
echo strtotime("10 September 2008"), "<br />";//输出 1220976000
echo strtotime("+1 day"), "<br />";//输出明天此时的时间戳
?>

Output:

1256112010
1220976000
1616496304

mktime()

mktime() function is used to get a timestamp from a date , returns the timestamp successfully, otherwise returns FALSE. Syntax:

mktime(hour,minute,second,month,day,year,is_dst);

Example:

<?php
echo mktime(21, 50, 55, 07, 14, 2021);//输出“1626270655”
?>

Parameters can be omitted from right to left. Any omitted parameters will be set to the current value of the local date and time. .

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