The source of birthday.php (click to demo the file) viewed 1822 times.

If I wrote this code, then it is licensed under the GPL. If someone else wrote it, then please ask them if you want to use the code.

<?php 

function howManyYears($birthday) { 
        //requires $birthday as yyyy/mm/dd OR yyyy-mm-dd 
        //and returns the number of years old the person is 
        $today = date('Ymd'); 

        $birthday = str_replace('/','',$birthday); 
        $birthday = str_replace('-','',$birthday); 


        $remainder = $today - $birthday; 

        $age = floor($remainder / 10000); 

        return $age; 
} 

//usage 
// birthday.php?birthday=1977-12-07

$birthday = $_GET["birthday"];

echo howManyYears($birthday); 

?>

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