WordPress - Remove empty p tags for custom shortcodes

gistfile1.php

<?php

add_filter("the_content", "the_content_filter");

function the_content_filter($content) {

	// array of custom shortcodes requiring the fix 
	$block = join("|",array("col","shortcode2","shortcode3"));

	// opening tag
	$rep = preg_replace("/(<p>)?\[($block)(\s[^\]]+)?\](<\/p>|<br \/>)?/","[$2$3]",$content);
		
	// closing tag
	$rep = preg_replace("/(<p>)?\[\/($block)](<\/p>|<br \/>)?/","[/$2]",$rep);

	return $rep;

}

Interesting.
But shouldn't it be content_save_pre or something rather than the_content that works when saving posts?
So it will put less server loads.

function my_sanitize_content($value){ $value = preg_replace("/<p>(\[[^<]+?)<\/p>/u","$1",$value); $value = preg_replace("/<p>(\[[^<]+?)<br \/>/u","$1<p>",$value); return $value; } add_filter('content_save_pre','my_sanitize_content',10,1);

Hey,
I have a child theme active right now. Should I add this snippet to functions of the child theme or the parent theme?
How may I add the code, in the end of the .php or?

Is this still working? I am having that issue

Is this still working? I am having that issue

i used this code

function clean_shortcodes($content) {
// List of shortcodes to process
$shortcodes = [
'item',
'itemalt'
];

// Process each shortcode
$content = array_reduce($shortcodes, function($carry, $shortcode) use ($content) {
    if (has_shortcode($carry, $shortcode)) {
        return preg_replace(
            "/(?:<p>|<br \/>)*\[(\/?{$shortcode})([^\]]*)\](?:<\/p>|<br \/>)*\s*/i",
            "[$1$2]",
            $carry
        );
    }
    return $carry;
}, $content);

return $content;

}
add_filter('the_content', 'clean_shortcodes', 10);