Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\cake\libs\debugger.php:686) [CORE\cake\libs\controller\controller.php, line 741] 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();
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