How to convert year, month and day to timestamp in php

Method for converting year, month and day to timestamp: 1. Use the date_parse_from_format() function to process a given date. An associative array containing the specified date information will be returned according to the specified format. The syntax is "date_parse_from_format('Y.m.d ', date)"; 2. Use the "mktime(0,0,0,$arr['month'],$arr['day'],$arr['year']);" statement to convert the year, month and day Just a timestamp.

The operating environment of this article: windows7 system, PHP8 version, DELL G3 computer

PHP specified date to timestamp

Use date_parse_from_format to convert the specified format: For example:

Output: 
Array ( [year] => 2018 [month] => 10 [day] => 1 [hour] => [minute] => [second] => [fraction] => [warning_count] => 0 [warnings] => Array ( ) [error_count] => 0 [errors] => Array ( ) [is_localtime] => )
 对应时间戳为：1538352000
mktime() definition and usage
## The #gmmktime() function returns the UNIX timestamp of a date. 
Tip: This function is the same as gmmktime(), except that the parameter passed represents a date (instead of a GMT date). 

Syntax
mktime(hour,minute,second,month,day,year,is_dst);
year Optional. Specified year. 

ParametersDescriptionhourOptional. Specified hours. minuteOptional. prescribed points. secondOptional. Specifies seconds. monthOptional. Specified month. day Optional. Specify days. is_dst














Optional. Set to 1 if the time is during Daylight Saving Time (DST), 0 otherwise, or -1 (default) if unknown. 
If unknown, PHP will do the search itself (which may produce unexpected results). 
Note: This parameter is deprecated in PHP 5.1.0. Instead, new time zone handling features are used. 



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