How can beginners in PHP development avoid errors like "headers already sent" when using functions like header() for redirection?

When using functions like header() for redirection in PHP, beginners can avoid errors like "headers already sent" by ensuring that no output is sent to the browser before calling the header() function. To do this, developers should make sure there is no whitespace before the opening <?php tag, remove any echo or print statements before the header() function, and avoid any HTML output before the header() function is called. 

&lt;?php
ob_start(); // Start output buffering

// Your PHP code here

ob_end_clean(); // Clean the output buffer

header(&quot;Location: http://www.example.com&quot;); // Redirect the user
exit(); // Ensure no further code is executed after the redirection

Keywords

PHP header() redirection output buffering beginners

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