Update README.md

Author: splitline

README.md

@@ -7,24 +7,47 @@ Only support PHP 7+ currently.
 The following source will execute `system('id');`:
 
 ```php
-<?php 
-  (((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]))([].[]^[].[],((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]))();
+<?php
+  (((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]))(...(((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]))(((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]^(([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[]).[])[([]^[])]).((([].[]))[([]^[[]])]^(([].[]))[([]^[[]])+([]^[[]])+([]^[[]])]^(([]^[[]]).[])[([]^[])])))();
 ?>
 ```
 
 ## Usage
 
 ```
-usage: phpfuck.py [-h] [-O FILE] [-P] code
+usage: phpfuck.py [-h] [-O FILE] [-P] [-E {assert,create_function}] code
 
 positional arguments:
-  code                  any php code to encode.
+  code                  any string to encode.
 
 optional arguments:
   -h, --help            show this help message and exit
   -O FILE, --output-file FILE
-                        write encoded code into some file.
+                        write encoded string into some file.
   -P, --plain-string    encode as plain string (without eval it).
+  -E {assert,create_function}, --eval {assert,create_function}
+                        choose eval mode. (`assert` mode only support PHP < 7.1)
 ```
 
-You can just use it like this: `python3 phpfuck.py "system('id');" `
+You can just use it like this: `python3 phpfuck.py "system('id');"`
+
+### Arguments
+- code (required)
+  - Any string or php code to encode.
+- -O, --output-file
+  - Write encoded string into some file.
+- -P, --plain-string
+  - Encode as plain string (without eval it). 
+  - With this argument, I will not wrap your code into `assert` or `create_function` to eval.
+- -E, --eval
+  - You can choose your eval mode!
+  - `create_function` mode (default)
+    - `create_function('', YOUR_CODE)();`
+  - `assert` mode
+    - Only support PHP < 7.1 (=7.0.x).
+    - `assert( (function(){ YOUR_CODE; return 1; })() );`
+
+## TODO
+- [ ] Support character other than ASCII.
+- [ ] Don't use deprecated feature. (`create_function` has been DEPRECATED)
+- [ ] Web interface.