Update options_resolver.rst

[atailouloute]

The old code will not work as expected if the host option starts with https, the substr function will return https:/ and not https://.

$resolver = new Symfony\Component\OptionsResolver\OptionsResolver;

$resolver->setDefined(['host', 'encryption']);
$resolver->setNormalizer('host', function (Options $options, $value) {

     if (!in_array(substr($value, 0, 7), array('http://', 'https://'))) {
        if ('ssl' === $options['encryption']) {
            $value = 'https://'.$value;
        } else {
            $value = 'http://'.$value;
        }
    }

    return $value;
});;


$options = $resolver->resolve(array(
    'host'       => 'https://symfony.com/',
    'encryption' => 'ssl'
));

echo $options['host'];
// Expected value : https://symfony.com/
// Result         : https://https://symfony.com/

[xabbuh]

👍

[xabbuh]

Thank you @atailouloute. I have merged your change into the 2.7branch from where I will merge it up to all other branches. That's why your PR is shown as closed instead of merged. Though you will still get all the credits for your contribution.