- "DebugMiddleware", // Debug middleware output sub-system
- "Registry", // Object registry
- "ObjectFactory", // Object factory
- "DebugWebOutput", // Debug web output sub-system
- "WebOutput", // Web output sub-system
- "CompressorChannel", // Compressor sub-system
- "DebugConsoleOutput", // Debug console output sub-system
- "DebugErrorLogOutput", // Debug error_log() output sub-system
- "FrameworkDirectoryPointer", // Directory handler sub-system
- "NullCompressor", // Null compressor
- "Bzip2Compressor", // BZIP2 compressor
- "GzipCompressor", // GZIP compressor
+ 'DebugMiddleware', // Debug middleware output sub-system
+ 'Registry', // Object registry
+ 'ObjectFactory', // Object factory
+ 'DebugWebOutput', // Debug web output sub-system
+ 'WebOutput', // Web output sub-system
+ 'CompressorChannel', // Compressor sub-system
+ 'DebugConsoleOutput', // Debug console output sub-system
+ 'DebugErrorLogOutput', // Debug error_log() output sub-system
+ 'FrameworkDirectoryPointer', // Directory handler sub-system
+ 'NullCompressor', // Null compressor
+ 'Bzip2Compressor', // BZIP2 compressor
+ 'GzipCompressor', // GZIP compressor