If you want all links in your WordPress posts to open in a new window, simply add the following code to your theme’s functions.php file:

function autoblank($text) {
	$text = str_replace('<a', '<a target="_blank"', $text);
	return $text;
}
add_filter('the_content', 'autoblank');

Paste the above code before the last ?> in your functions.php file. This way, whenever a visitor clicks any link within a post, it will open in a new window. This approach improves the user experience by preventing visitors from navigating away from the current page.