Remove empty p tags from WordPress posts

remove-empty-p.php

<?php
add_filter( 'the_content', 'remove_empty_p', 20, 1 );
function remove_empty_p( $content ){
	// clean up p tags around block elements
	$content = preg_replace( array(
		'#<p>\s*<(div|aside|section|article|header|footer)#',
		'#</(div|aside|section|article|header|footer)>\s*</p>#',
		'#</(div|aside|section|article|header|footer)>\s*<br ?/?>#',
		'#<(div|aside|section|article|header|footer)(.*?)>\s*</p>#',
		'#<p>\s*</(div|aside|section|article|header|footer)#',
	), array(
		'<$1',
		'</$1>',
		'</$1>',
		'<$1$2>',
		'</$1',
	), $content );

	return preg_replace('#<p>(\s|&nbsp;)*+(<br\s*/*>)*(\s|&nbsp;)*</p>#i', '', $content);
}

Wanted to chime in to say 'thank you' for this gist. I was finally fed up with a crappy theme I'm using that aggressively added empty tags every time you hit save on a page. (Going to be moving away from the theme in the future, but gotta get through the next 2 months first). This is/was a life saver.

Adding this jQuery works perfectly fine for me

$('p').each(function() { const $this = $(this); if($this.html().replace(/\s| /g, '').length === 0) $this. Remove(); });

If the p tag is completely empty without space or &nbsp, then this should work
$( 'p:empty' ).remove();