- Addressed potential vulnerabilities related to SandboxedStrings where sandboxed code could manipulate the strings in a way that could defeat their protection
- Solved errors from casting sandboxed strings to int
- Overwrote some internal PHP functions to further mask SandboxedStrings from the sandboxed code and prevent type-checking errors
- Added more tests related to SandboxedStrings
- Made some minor tweaks to PHPSandbox Toolkit