fallback_intermediate_image_sizes

apply_filters('fallback_intermediate_image_sizes') is found 2 times:

• /wp-admin/includes/image.php line 686

  		 *
  		 * @param string[] $fallback_sizes An array of image size names.
  		 * @param array    $metadata       Current attachment metadata.
  		 */
  		$fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata );
  
  		$registered_sizes = wp_get_registered_image_subsizes();
  		$merged_sizes     = array_intersect_key( $registered_sizes, array_flip( $fallback_sizes ) );
  
  		// Force thumbnails to be soft crops.
  		if ( isset( $merged_sizes['thumbnail'] ) && is_array( $merged_sizes['thumbnail'] ) ) {
  

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• /wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php line 1021

  				// The filter might have been added by ::create_item().
  				remove_filter( 'fallback_intermediate_image_sizes', '__return_empty_array', 100 );
  
  				/** This filter is documented in wp-admin/includes/image.php */
  				$fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata );
  
  				$registered_sizes = wp_get_registered_image_subsizes();
  				$merged_sizes     = array_keys( array_intersect_key( $registered_sizes, array_flip( $fallback_sizes ) ) );
  
  				$data['missing_image_sizes'] = array_values( array_diff( $merged_sizes, array_keys( $metadata['sizes'] ) ) );
  			}
  

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