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PHP Date and Time Handling

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Jan 02.2011

I’m real bad at using the PHP date and time functions. I was hoping someone could tell me how I could check to see if someone is 18 by passing in a date of birth to a function and obviously comparing it to today’s date.

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PHP

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@DexterMorganJan 02.2011 — Is this what you mean?
[code=php]
<?php
/**
* Check if a given D.O.B is over 18
* @param string date of birth
* @return bool
*/
function checkAge($dob){
$age = strtotime($dob);
$eighteen = 566092800; // 18 years

$diff = time() - $age;

if($diff > $eighteen){
return true;
}
return false;

}

//usage
if(checkAge('11 may 2000')){
echo 'Old enough';
}else{
echo 'not Old enough';
}
?>

[/code]
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@NogDogJan 03.2011 — If using PHP 5.3.0+, you can use [url=http://www.php.net/manual/en/datetime.diff.php]DateTime::diff[/url](). Also, if working with database date information, it might be desirable to do it as part of the DB query, for instance using the MySQL [url=http://www.php.net/manual/en/datetime.diff.php]DATE_SUB() or DATE_ADD() functions[/url].
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