_device_can_upload() │ WP 3.4.0

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

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

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

Usage

_device_can_upload();

Changelog

Since 3.4.0 Introduced.

_device_can_upload() code WP 7.0

wp-includes/functions.php 
function _device_can_upload() {
	if ( ! wp_is_mobile() ) {
		return true;
	}

	$ua = $_SERVER['HTTP_USER_AGENT'];

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

	return true;
}