timestamp php

<?php

echo time();

?>

<?php
$current_Unix_time_in_seconds = time();
echo $current_Unix_time_in_seconds; //Prints ten digit integer
//To convert the above unix integer time to string follow the below steps

$date = date("D d-m-Y", $current_Unix_time_in_seconds);
echo $date;
//prints date in the format of day day-month-year

//for more reference visit the source link
?>

strtotime("now");

// strtotime is a function that will take a string parameter 
// that specifies a date, and returns a unix time stamp bassed
// on that

echo strtotime("2020-02-24");

// prints: 1582502400

<?php
$date = new DateTime();
echo $date->getTimestamp();
?>

<?php
$date = date_create();
echo date_timestamp_get($date);
?>

<?php
$nextWeek = time() + (7 * 24 * 60 * 60);
                   // 7 days; 24 hours; 60 mins; 60 secs
echo 'Now:       '. date('Y-m-d') ."\n";
echo 'Next Week: '. date('Y-m-d', $nextWeek) ."\n";
// or using strtotime():
echo 'Next Week: '. date('Y-m-d', strtotime('+1 week')) ."\n";
?>