: Cannot modify header information - headers already sent by (output started at D:\xampp\htdocs\Sahara\php\S_function.php:309) in 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.