Update readme for php 5 problems

Author: ganlvtech

README.md

@@ -28,75 +28,9 @@ Call `bin/decode.php` decode `input.php` and save it to `output.php`.
 
 ## About EnPHP Bugs
 
-EnPHP has bugs. The obfuscated files cannot even run properly. You shouldn't ask a decoder to revert a broken file to a normal file.
-
-Here are some known EnPHP bugs. They **WON'T** be fixed.
-
-### Class Static Call
-
-```php
-class Foo
-{
-    public static function baz()
-    {
-        echo 'baz';
-    }
-}
-
-class Bar extends Foo
-{
-    public function __construct()
-    {
-        parent::baz();
-    }
-}
-```
-
-class Bar will be obfuscated like this
-
-```php
-class Bar extends Foo
-{
-    public function __construct()
-    {
-        parent::$GLOBALS[GLOBAL_VAR_KEY][0x0]();
-    }
-}
-```
-
-This means `(parent::$GLOBALS)[GLOBAL_VAR_KEY][0x0]();` instead of what we expected `parent::{$GLOBALS[GLOBAL_VAR_KEY][0x0]}();`.
-
-### Class Method Call
-
-```php
-class Foo
-{
-    public function bar()
-    {
-        echo 'bar';
-    }
-
-    public function __construct()
-    {
-        $this->bar();
-    }
-}
-```
-
-The constructor will be encoded like this
-
-```php
-class Foo
-{
-    public function __construct()
-    {
-        $v0 = &$GLOBALS[GLOBAL_VAR_KEY];
-        $this->$v0[0x0]();
-    }
-}
-```
+**EnPHP is for php 5. There may be some problem is you use the obfuscated files on php 7.**
 
-This means `($this->$v0)[0x0]()` instead of what we expected `$this->{$v0[0x0]}()`.
+See <docs/enphp_bugs.md>.
 
 ## License
 

docs/enphp_bugs.md

@@ -0,0 +1,75 @@
+# About EnPHP Bugs
+
+**EnPHP is for php 5. There may be some problem is you use the obfuscated files on php 7.**
+
+**php 5.5 5.6 7.0 is no longer supported.** See [PHP: Supported Versions](http://php.net/supported-versions.php).
+
+EnPHP has bugs. The obfuscated files cannot even run properly on php 7. You shouldn't ask a decoder to recover a broken file to a normal file.
+
+Here are some known EnPHP bugs running on php 7. They **WON'T** be fixed.
+
+## Class Static Call
+
+```php
+class Foo
+{
+    public static function baz()
+    {
+        echo 'baz';
+    }
+}
+
+class Bar extends Foo
+{
+    public function __construct()
+    {
+        parent::baz();
+    }
+}
+```
+
+class Bar will be obfuscated like this
+
+```php
+class Bar extends Foo
+{
+    public function __construct()
+    {
+        parent::$GLOBALS[GLOBAL_VAR_KEY][0x0]();
+    }
+}
+```
+
+This means `(parent::$GLOBALS)[GLOBAL_VAR_KEY][0x0]();` instead of what we expected `parent::{$GLOBALS[GLOBAL_VAR_KEY][0x0]}();`.
+
+## Class Method Call
+
+```php
+class Foo
+{
+    public function bar()
+    {
+        echo 'bar';
+    }
+
+    public function __construct()
+    {
+        $this->bar();
+    }
+}
+```
+
+The constructor will be encoded like this
+
+```php
+class Foo
+{
+    public function __construct()
+    {
+        $v0 = &$GLOBALS[GLOBAL_VAR_KEY];
+        $this->$v0[0x0]();
+    }
+}
+```
+
+This means `($this->$v0)[0x0]()` instead of what we expected `$this->{$v0[0x0]}()`.