The import_upload_size_limit WordPress PHP Filter allows you to modify the maximum allowed upload size for import files.
Usage
add_filter('import_upload_size_limit', 'your_custom_function');
function your_custom_function($max_upload_size) {
// your custom code here
return $max_upload_size;
}
Parameters
- $max_upload_size (int) – Allowed upload size. Default 1 MB.
More information
See WordPress Developer Resources: import_upload_size_limit
Examples
Increase the maximum upload size
Increase the maximum allowed upload size to 5 MB.
add_filter('import_upload_size_limit', 'increase_import_upload_size_limit');
function increase_import_upload_size_limit($max_upload_size) {
return 5 * 1024 * 1024; // 5 MB
}
Decrease the maximum upload size
Decrease the maximum allowed upload size to 500 KB.
add_filter('import_upload_size_limit', 'decrease_import_upload_size_limit');
function decrease_import_upload_size_limit($max_upload_size) {
return 500 * 1024; // 500 KB
}
Set the maximum upload size based on user role
Allow administrators to upload larger import files (10 MB) and keep the default limit for other users.
add_filter('import_upload_size_limit', 'set_upload_size_based_on_role');
function set_upload_size_based_on_role($max_upload_size) {
if (current_user_can('activate_plugins')) {
return 10 * 1024 * 1024; // 10 MB for administrators
}
return $max_upload_size; // Default limit for other users
}
Disable imports by setting the maximum upload size to zero
Disallows file imports by setting the maximum allowed upload size to 0.
add_filter('import_upload_size_limit', 'disable_imports');
function disable_imports($max_upload_size) {
return 0; // Disable imports
}
Set the maximum upload size based on file extension
Allow larger upload sizes for XML files (3 MB) and keep the default limit for other file types.
add_filter('import_upload_size_limit', 'set_upload_size_based_on_file_extension', 10, 2);
function set_upload_size_based_on_file_extension($max_upload_size, $extension) {
if ($extension === ‘xml’) {
return 3 * 1024 * 1024; // 3 MB for XML files
}
return $max_upload_size; // Default limit for other file types
}