I find timestamp more flexible to use. Using time function which returns current Unix timestamp. We have the flexibility to change the timestamp according to the display requirement for our date and time by using date function.

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<?php

//getting current unix timestamp from time() function
$time = time();
echo "Current Unix timestamp: ";
echo $time;
echo "<br/><br/>";

//manipulating the current timestamp with date() function
$date = date("F d, Y h:i:s",time());
echo "Current Date and Time: ";
echo $date;
echo "<br/><br/>";

?>

One more PROBLEM

Suppose that we have 3 selection list. First for months, second for days, and third for years. Now, we want to insert the date obtained from these selection list into our database.

The solution is by using strtotime() function. This function parse about any English textual datetime description into a Unix timestamp.

<?php

// Suppose we got these data from our selection list
$month = "February";
$day = 14;
$year = "2008";

// using strototime() function
$str_time = strtotime("$day $month $year");
echo "Unix timestamp from strtotime function: ";
echo $str_time;
echo "<br/><br/>";

?>