fallback_intermediate_image_sizes
Filter HookDescription
Filters the image sizes generated for non-image mime types.Hook Information
| File Location | wp-admin/includes/image.phpView on GitHub | 
| Hook Type | Filter | 
| Line Number | 686 | 
Hook Parameters
| Type | Name | Description | 
|---|---|---|
| string[] | $fallback_sizes | An array of image size names. | 
| array | $metadata | Current attachment metadata. | 
Usage Examples
                        Basic Usage
                    
                    <?php
// Hook into fallback_intermediate_image_sizes
add_filter('fallback_intermediate_image_sizes', 'my_custom_filter', 10, 2);
function my_custom_filter($fallback_sizes, $metadata) {
    // Your custom filtering logic here
    return $fallback_sizes;
}
Source Code Context
                        wp-admin/includes/image.php:686
                        - How this hook is used in WordPress core
                    
                    <?php
 681  		 * @since 4.7.0
 682  		 *
 683  		 * @param string[] $fallback_sizes An array of image size names.
 684  		 * @param array    $metadata       Current attachment metadata.
 685  		 */
 686  		$fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata );
 687  
 688  		$registered_sizes = wp_get_registered_image_subsizes();
 689  		$merged_sizes     = array_intersect_key( $registered_sizes, array_flip( $fallback_sizes ) );
 690  
 691  		// Force thumbnails to be soft crops.
PHP Documentation
<?php
/**
		 * Filters the image sizes generated for non-image mime types.
		 *
		 * @since 4.7.0
		 *
		 * @param string[] $fallback_sizes An array of image size names.
		 * @param array    $metadata       Current attachment metadata.
		 */
                        Quick Info
                    
                    - Hook Type: Filter
- Parameters: 2
- File: wp-admin/includes/image.php
                        Related Hooks
                    
                    Related hooks will be displayed here in future updates.
