How can changing themes in WordPress affect the presence of extra spaces before the doctype declaration?

Changing themes in WordPress can sometimes introduce extra spaces before the doctype declaration in the HTML output. This can cause layout issues and affect the overall appearance of the website. To solve this problem, you can use the `get_header()` function in your theme's header.php file to ensure that there are no extra spaces before the doctype declaration. 

<?php
ob_start();
get_header();
ob_end_clean();
?>

Keywords

WordPress themes extra spaces doctype declaration PHP

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