[Sync EN] Split the illegal string offsets example output by PHP version (#5232)

[github-actions]

Commit: https://github.com/php/doc-en/commit/eb4bde8a489ee6523879baa482247ed49aea951d
PR: https://github.com/php/doc-en/pull/5232

Archivos ES a actualizar

• language/types/string.xml