symfony/symfony — pull request #11259 by ccorliss (2014-06-30 18:49:03+00:00)
Title: [Config] Fixed failed config schema loads due to libxml_disable_entity_loader usage

| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #11258
| License | MIT
| Doc PR | N/A

PR #10493 helped this issue, but it can still affect users that:

1. Have libxml_disable_entity_loader set to true by default.
2. Experience libxml_disable_entity_loader php bug https://bugs.php.net/bug.php?id=64938

I used the same approach used in the DI xml validation.
https://github.com/symfony/symfony/blob/master/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php#L452