Add README

Author: zzfly256

README.md

@@ -0,0 +1,68 @@
+# PHP ImageResize Library
+## What is it
+A library implemented by PHP to **resize image smartly** and add water mark.
+
+This library will help you resize the image according to the width and height defined and cut smartly to promise the length-to-width ratio, and add water mark in the mean time.
+
+## Requirements
+- PHP 5 +
+- PHP GD
+- composer
+> Please assure that you have installed php-gd, and install it via `apt install php7.0-gd` or `apt install php5-gd` is recommended.
+
+## Installation
+Here are two ways to install:
+- Using composer:
+    ```
+    composer require php-quickorm/image-resize
+    ```
+
+- or download the `ImageResize.php` to your project and import it by `require "ImageResize.php";`
+
+## Usage
+
+### Resize
+
+```php
+// Resize the firework.jpg to 800x600
+$a = new ImageResize(realpath('firework.jpg'),800,600);
+
+// Save to firework2.png;
+$a->save("firework.png");
+
+// or send as HTTP response
+$a->render();
+```
+
+### Water Mark
+
+```php
+// Resize the firework.jpg to 800x600
+$a = new ImageResize(realpath('firework.jpg'),800,600);
+
+/*
+* Add text to image
+* The font size is 1 - 5 and the position only supports bottom-left, bottom-right, top-left, top-right 
+*/
+
+// use font size 5, color #ffffff and place at bottom-right with margin 10px
+$a->addTextMark("Author:Rytia", 5, "#ffffff", "right", "bottom",10);
+// use font size 4, color #ccccc and place at bottom-left with margin 15px
+$a->addTextMark("Blog:www.zzfly.net", 4, "#cccccc", "left", "bottom",15);
+
+
+/*
+* Add water mark to image
+* The position only supports bottom-left, bottom-right, top-left, top-right 
+*/
+$a->addImageMark(realpath('mark.jpg'),100,80,"right","bottom",50);
+
+// Save to firework2.png;
+$a->save("firework.png");
+
+// or send as HTTP response
+$a->render();
+
+```
+
+![img](http://wx4.sinaimg.cn/large/d3ea10bdgy1g05zo3tvfbj211e04n3z4.jpg)