prepare method added.

docs/EN-README.md

@@ -169,4 +169,16 @@ The path of the folder where `Mind.php` is located is kept in `$this->baseurl`,
 
 ## connection()
 
-It is used to provide database connection in the light of the information specified in the [installation](#installation) phase. It was run in `__construct()` method in `Mind.php` file.
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+It is used to provide database connection in the light of the information specified in the [installation](#installation) phase. It was run in `__construct()` method in `Mind.php` file.
+
+----------
+
+## prepare()
+
+It is used to run SQL queries, it has `public` definition to send `SQL` query from outside the class. The `SQL` query can be sent as `string`.
+   
+##### Example
+
+    $Mind->prepare($sql);
+
+----------
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