WordPress at a glance
filter is not described

import_upload_size_limit filter-hook . WP 2.3.0

Filters the maximum allowed upload size for import files.

Usage

add_filter( 'import_upload_size_limit', 'filter_function_name_5897' );
function filter_function_name_5897( $max_upload_size ){
	// filter...

	return $max_upload_size;
}
$max_upload_size(int)
Allowed upload size.
Default: 1 MB

Where the hook is called

wp_import_upload_form()
WC_Tax_Rate_Importer::greet()
WC_Product_CSV_Importer_Controller::upload_form()
wp-admin/includes/template.php 875
$bytes = apply_filters( 'import_upload_size_limit', wp_max_upload_size() );
woocommerce/includes/admin/importers/class-wc-tax-rate-importer.php 252
$bytes      = apply_filters( 'import_upload_size_limit', wp_max_upload_size() );
woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php 276
$bytes      = apply_filters( 'import_upload_size_limit', wp_max_upload_size() );

Where the hook is used (in WP core)

wp-includes/ms-default-filters.php 70
add_filter( 'import_upload_size_limit', 'fix_import_form_size' );