What is WordPress Hook: image_sideload_extensions
The image_sideload_extensions hook in WordPress is used to modify the list of allowed file extensions when sideloading an image. This hook allows developers to add or remove file extensions that are permitted when using the sideload_image() function in WordPress.
Understanding the Hook: image_sideload_extensions
The image_sideload_extensions hook is located within the wp-admin/includes/file.php file in WordPress. It is specifically used within the sideload_image() function to filter the list of allowed file extensions for sideloading images.
Hook Parameters (if applicable): image_sideload_extensions
The image_sideload_extensions hook does not accept any parameters. It is a simple filter hook that allows developers to modify the list of allowed file extensions directly.
Hook Doesn’t Work: image_sideload_extensions
If the image_sideload_extensions hook doesn’t seem to be working, it could be due to a conflict with another plugin or theme that is also modifying the list of allowed file extensions. In this case, it is recommended to deactivate other plugins or switch to a default theme to troubleshoot the issue.
Best Practices & Usage Notes (if applicable): image_sideload_extensions
When using the image_sideload_extensions hook, it is important to consider the security implications of allowing additional file extensions for sideloading images. It is recommended to only add file extensions that are necessary for your specific use case and to avoid adding potentially harmful file types.
Usage Example: image_sideload_extensions
“`php
function custom_image_sideload_extensions( $extensions ) {
// Add SVG file extension to the list of allowed extensions
$extensions[] = ‘svg’;
return $extensions;
}
add_filter( ‘image_sideload_extensions’, ‘custom_image_sideload_extensions’ );
“`