Changing or removing a function within a plugin - php

Question

Perfect woocommerce brands only allows certain tags to be used and removes the rest via the function
if( isset( $_POST['pwb_brand_description_field'] ) ){
$desc = strip_tags(
wp_unslash( $_POST['pwb_brand_description_field'] ),
'<p><span><a><ul><ol><li><h1><h2><h3><h4><h5><h6><pre><strong><em><blockquote><del><ins><img><code><hr>'
);
global $wpdb;
$wpdb->update( $wpdb->term_taxonomy, [ 'description' => $desc ], [ 'term_id' => $term_id ] );
I am looking for a way to overide this so that I can include all tags, in particular <div>
I was hoping there might be something that I could add to functions.php which would help me achieve this?

Answer 1

Because the plugin author did not add any filters / hooks for this particular function, you have to do a fairly clunky work-around.
Thankfully, this function is called via a couple of actions
add_action( 'edit_pwb-brand', array( $this, 'add_brands_metafields_save' ) );
add_action( 'create_pwb-brand', array( $this, 'add_brands_metafields_save' ) );
That means that we may be able to add our own actions that run after those two, and may be able to do what you want.
Note that this is sub-optimal but cannot be avoided. This function is essentially running twice (the original in the plugin, plus yours), which is not good for performance - however, since this is only happening when an admin saves a brand, it shouldn't be too bad for performance.
First, add your own action(s) with a higher priority, then copy the original function with the desired modifications.
It's often recommended that you do this in your theme's functions.php file, but that's not ideal - what if you want to change themes, or update themes, but keep this functionality? Instead, I strongly recommended you build your own small, light-weight plugin. The complete code for such a plugin is below. (Simply add this code to a PHP file, and place it in your plugins directory).
<?php
/**
* Plugin Name: Override Perfect WooCommerce Brands Meta
* Description: Custom override to permit div tags in brand meta description
* Version: 1.0.0
* Author: SupGen
*/
// Note the higher priority levels - to ensure these run AFTER the main plugin is done
add_action( 'edit_pwb-brand', 'override_add_brands_metafields_save', 9999 );
add_action( 'create_pwb-brand', 'override_add_brands_metafields_save', 9999 );
function override_add_brands_metafields_save( $term_id ) {
// NOTE: hard-coding the file name here in order to verify the nonce. MAY need to be changed
$filename = 'class-brands-custom-fields.php';
if ( ! isset( $_POST[ 'pwb_nonce' ] ) || ! wp_verify_nonce( $_POST[ 'pwb_nonce' ], $filename ) ) {
return;
}
// removed bits you didn't care about, keeping only the relevant part
if ( isset( $_POST[ 'pwb_brand_description_field' ] ) ) {
// added div tag to allowed tags list
$desc = strip_tags(
wp_unslash( $_POST[ 'pwb_brand_description_field' ] ),
'<div><p><span><a><ul><ol><li><h1><h2><h3><h4><h5><h6><pre><strong><em><blockquote><del><ins><img><code><hr>'
);
global $wpdb;
$wpdb->update( $wpdb->term_taxonomy, [ 'description' => $desc ], [ 'term_id' => $term_id ] );
}
}