WordPress at a glance
function is not described

_device_can_upload() WP 3.4.0

Test if the current device has the capability to upload files.

No Hooks.

Return

true/false. Whether the device is able to upload files.

Usage

_device_can_upload();

Code of device can upload: wp-includes/functions.php VER 5.1.1

<?php
function _device_can_upload() {
	if ( ! wp_is_mobile() ) {
		return true;
	}

	$ua = $_SERVER['HTTP_USER_AGENT'];

	if ( strpos( $ua, 'iPhone' ) !== false
		|| strpos( $ua, 'iPad' ) !== false
		|| strpos( $ua, 'iPod' ) !== false ) {
			return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );
	}

	return true;
}