[Solved] I want to print age in my bill from dob. dob is stored in $_SESSION but its not printing the age in html page

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<?php session_start();  ?> 
    <?php $dob = $_SESSION['dob'];  ?> 
    <html> 
    <head> </head> 
    <body> Age:<?php $from = new DateTime($dob); $to = new DateTime('today'); echo $from->diff($to)->y; ?> 
    </body> 
    </html>

You didnt start the session on that page.

And I changed new DateTime(‘$dob’) to new DateTime($dob) because is variable.

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solved I want to print age in my bill from dob. dob is stored in $_SESSION but its not printing the age in html page