Warning: Cannot modify header information - headers already sent by (output started at /home/content/77/8866377/html/gsmarenabd/insert_model.php:25) in/home/content/77/8866377/html/gsmarenabd/insert_model.php on line 105 this occurs when i add a header redirect in my script. what does the line insert_model.php:25 means. and what is the solution of this error please can anyone tell me.
It means there is output to the browser before your redirect. You can have logic and php code, but you cannot output anything to the browser before a redirect.
try placing this at the top of your page: <? ob_start(); ?> then at the bottom of the page place this line of code: <? ob_flush(); ?>
this only means that there's some text that is already echoed or printed even before you call header(); if not, check for spaces before <?php..