age in months 1

[prakash2000]

dear friends,
i have inclusion criteria for age group between 9 and 11.99 in months.how to i check dob in the above range in php.

im new in php.

thanks in advance
prakash

 

[jpadie]

pre php 5.3 there is no easy way to handle time intervals in anything other than seconds. so we do things programmatically

<?php
echo (validates('2009-01-01') === true) ? 'ok': 'not ok';

function validates($dob){
	if (!is_numeric($dob)) $dob = strtotime($dob);//check if already in unix timestamp format
	$now = time();
	if (strtotime('+1 year', $dob) <= $now) return false; //check whether more than 11.99 months
	if (strtotime('+9 months', $dob) > $now) return false ;//check whether less than 9 months have passed
	return true;
}
?>

if you have php 5.3 then the new datetime class will work well

function validates($dob){
	$dob = new DateTime($dob);
	$diff = $dob->diff(new datetime());
	$months = abs($diff->months);
	if ($months > 12 || $months < 9) return false;
	return true;
}

if you have a database such as mysql then the code is easier still

function validates($dob){
	return (bool) mysql_result(mysql_query("select if (date_add('$dob', interval 9 month) <= now() && date_add('$dob', interval 12 month) > now()), true, false)"), 0, 0);
}

 

[jpadie]

i should add that it is good practice to ensure that a valid time zone is set before using any of php's date/time functions

 

[prakash2000]

Thank you very much jpadie. the script is perfect