Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\PinCode\User\index.php:6) in C:\xampp\htdocs\PinCode\User\index.php on line 75 code example
Example: Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\heermatka\myprofile.php:48) in C:\xampp\htdocs\heermatka\myprofile.php on line 144
ob_start();
Please paste top on the page.