How to remove "headers already sent" error in PHP

 

This error occurs mainly when you are working PHP in Linux Servers.

Method 1

The "headers already sent" error is usually caused by having white space before or after the opening and closing PHP tags (<?php . . . ?>).

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Method 2

In top of page put

ob_start();

In bottom of page put

ob_flush();

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Method 3

Please don’t put any HTML Content or <?php echo “ ”; ?> tags before header () function. It’s simply means that before executing header () function nothing will displayed as HTML.

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