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How to get First and last time stamp value of a particular date in PHP

PHP custom function to get  First and last time stamp value of a particular date.

To generate unix time from a date we use mktime() function in php

Syntax of the function is given below:

mktime ([ int $hour = date("H") [, int $minute = date("i") [, int $second = date("s") [, int $month = date("n") [, int $day = date("j") [, int $year = date("Y") [, int $is_dst = -1 ]]]]]]] )

**$is_dst means "is DST ( Daylight Saving time) applied

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

Sample use:
mktime(0,0,0,4,23,2007) will give first time stamp of the day April 23, 2007
mktime(23,59,59,4,23,2007) will give last time stamp of the day April 23, 2007

Here is a function which return the first and last timestamps of a date given in "mm/dd/yyyy" format

// input date should be in format mm/dd/yyyy

function FirstLastTimestampOfDay($date){


$firstTimeStamp = mktime(0 , 0 , 0 , $arrdate[0] , $arrdate[1] , $arrdate[2] );

$lastTimeStamp = mktime(23 , 59 , 59 , $arrdate[0] , $arrdate[1] , $arrdate[2] );

= array( "date" => $date , "first_ts" = > $firstTimeStamp , "last_ts" => $lastTimeStamp );

return( $resTime );


Hope this helps :)

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