Please consider using the the latest stable version for any production code.
The Scheme component
The Scheme class eases scheme creation and manipulation. This URI component object only exposes the package common API.
Usage
<?php
use League\Uri\Components\Scheme;
$scheme = new Scheme('FtP');
echo $scheme->getContent(); //display 'ftp'
echo $scheme; //display 'ftp'
echo $scheme->getUriComponent(); //display 'ftp:'
$new_scheme = $scheme->withContent(null);
echo $new_scheme->getContent(); //display null
echo $new_scheme; //display ''
echo $new_scheme->getUriComponent(); //display ''
The delimiter : is not part of the component value and must not be added.
If the submitted value is not valid a League\Uri\Exceptions\SyntaxError exception is thrown.