upload_is_file_too_big() │ WP 3.0.0

Checks whether an upload is too big.

No Hooks.

Returns

String|Array. If the upload is under the size limit, $upload is returned. Otherwise returns an error message.

Usage

upload_is_file_too_big( $upload );
$upload(array) (required)
An array of information about the newly-uploaded file.

Changelog

Since 3.0.0 Introduced.

upload_is_file_too_big() code WP 6.9.1

wp-includes/ms-functions.php 
function upload_is_file_too_big( $upload ) {
	if ( ! is_array( $upload ) || defined( 'WP_IMPORTING' ) || get_site_option( 'upload_space_check_disabled' ) ) {
		return $upload;
	}

	if ( strlen( $upload['bits'] ) > ( KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 ) ) ) {
		/* translators: %s: Maximum allowed file size in kilobytes. */
		return sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ) . '<br />', get_site_option( 'fileupload_maxk', 1500 ) );
	}

	return $upload;
}