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wp-content/plugins/file-manager-advanced/application/library/exec-with-fallback/README.md

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+# ExecWithFallback Library
+
+This is the **exec-with-fallback** library integrated into the Advanced File Manager plugin.
+
+## About
+
+Some shared hosts may have disabled `exec()`, but left `proc_open()`, `passthru()`, `popen()` or `shell_exec()` open. This library provides fallback functionality to emulate `exec()` using these alternative functions.
+
+## Usage
+
+The library is automatically loaded by the FMA Debug Validator class and provides enhanced PHP syntax validation capabilities.
+
+## Files
+
+- `src/ExecWithFallback.php` - Main class with fallback functionality
+- `src/Passthru.php` - Passthru implementation
+- `src/POpen.php` - POpen implementation  
+- `src/ProcOpen.php` - ProcOpen implementation
+- `src/ShellExec.php` - ShellExec implementation
+- `src/Availability.php` - Function availability checker
+- `autoload.php` - Simple autoloader for the library
+
+## Integration
+
+This library is used by:
+- `class_fma_debug_validator.php` - For robust PHP syntax validation
+- Enhanced debug features in the file manager
+
+## License
+
+GPL-3.0 (same as the main plugin)
+
+## Original Source
+
+https://github.com/rosell-dk/exec-with-fallback