Unset WordPress image sizes

unset-image-sizes-intermediate-image-filter.php

<?php 
/**
 * @Llink https://perishablepress.com/disable-wordpress-generated-images/
 * @link https://developer.wordpress.org/reference/hooks/intermediate_image_sizes_advanced/
 * @link https://hookr.io/4.9/filters/image_size_names_choose/
 */


/*----------  Register hooks in order of execution  ----------*/
add_filter( 'intermediate_image_sizes_advanced', 'decomtheme_images_remover', 10, 1 );



/*----------  Hook function definitions (in same order)  ----------*/
function decomtheme_images_remover( $sizes ) {

	unset( $sizes['small']); // 150px
	unset( $sizes['medium']); // 300px
	unset( $sizes['large']); // 1024px
	unset( $sizes['medium_large']); // 768px
	return $sizes;

}