Unhook actions/filters belonging to anonymous objects

wp-unhook-anonymous-obj-methods.php

<?php
/**
 * Sample approach for removing action/filter functions belonging
 * to anonymous objects.
 */
function remove_anonymous_objects_from_wp_hooks() {
	global $wp_filter;

	// Specific hooks and priorities we want to search
	$hooks = [
		[ 'pre_get_posts', 100 ],
		[ 'the_posts',     10  ]
	];

	// Types we're interested in removing
	$unwanted_types = [
		'someVendor\SomeClass',
		'otherVendor\DifferentClass'
	];

	// Look in the correct target areas
	foreach ( $hooks as $hook_priority ) {
		list( $hook, $priority ) = $hook_priority;

		// Nothing set up on this hook/priority? Safe to skip
		if ( ! isset( $wp_filter[$hook] ) || ! isset( $wp_filter[$hook][$priority] ) ) continue;

		// Scan for callbacks within our unwanted types
		foreach ( $wp_filter[$hook][$priority] as $action ) {
			// Skip top-level functions and objects not on our unwanted types list
			if ( ! is_array( $action['function'] ) ) continue;
			if ( ! in_array( get_class( $action['function'][0] ), $unwanted_types ) ) continue;

			// Purge
			remove_action( $hook, array( $action['function'][0], $action['function'][1] ), $priority );
		}
	}
}