read me update

Author: Jay-r Simpron

README.md

@@ -9,4 +9,142 @@ Just place the url into your image tag.
 
 <img href="http://www.yourdomain.com/index.php?height=150&width=150&path=/path/to/your/image/file/" />
 
+```
+
+## php code
+
+```
+
+<?php
+	/**
+	 * View image dynamically
+	 * 
+	 * @return mixed
+	 */
+	function view_image(){
+		ini_set('gd.jpeg_ignore_warning', true);
+		$path = $_GET["path"];
+		
+		if(@getimagesize($path) === FALSE){
+			$path = getcwd().'/assets/images/default.jpg';
+		}
+
+	 //getting extension type (jpg, png, etc)
+	    $type = explode(".", $path);
+	    $ext = strtolower($type[sizeof($type)-1]);
+
+	    $ext = (!in_array($ext, array("jpeg","png","gif"))) ? "jpeg" : $ext;
+
+	    //get image size
+	    $size = getimagesize($path);
+
+	    $width = $size[0];
+	    $height = $size[1];
+	    
+	    //get source image
+	    $func = "imagecreatefrom".$ext;
+	    $source = $func($path);
+	    
+	    //setting default values
+	    
+	    $new_width = $width;
+	    $new_height = $height;
+	    $k_w = 1;
+	    $k_h = 1;
+	    $dst_x =0;
+	    $dst_y =0;
+	    $src_x =0;
+	    $src_y =0;
+	    
+	    //selecting width and height
+
+	    if($_GET["width"]==null && $_GET["height"]==null)
+	    {
+	        $new_height = $height;
+	        $new_width = $width;
+	    }
+	    else if($_GET["width"]==null)
+	    {
+	        $new_height = $_GET["height"];
+	        $new_width = ($_GET["height"])/$height;
+	    }
+	    else if($_GET["height"]==null)
+	    {
+	        $new_height = ($height*$_GET["width"])/$width;
+	        $new_width = $_GET["width"];
+	    }
+	    else
+	    {
+	        $new_width = $_GET["width"];
+	        $new_height = $_GET["height"];
+	    }
+	    
+	    //secelcting_offsets
+	        
+	        if($new_width>$width )//by width
+	        {
+	            $dst_x = ($new_width-$width)/2;
+	        }
+	        if($new_height>$height)//by height
+	        {
+	            $dst_y = ($new_height-$height)/2;
+	        }
+	        if( $new_width<$width || $new_height<$height )
+	        {
+	            $k_w = $new_width/$width;
+	            $k_h = $new_height/$height;
+	            
+	            if($new_height>$height)
+	            {
+	                $src_x  = ($width-$new_width)/2;
+	            }
+	            else if ($new_width>$width)
+	            {
+	                    $src_y  = ($height-$new_height)/2;
+	            }
+	            else
+	            {
+	                if($k_h>$k_w)
+	                {
+	                    $src_x = round(($width-($new_width/$k_h))/2);
+	                }
+	                else
+	                {
+	                    $src_y = round(($height-($new_height/$k_w))/2);
+	                }
+	            }
+	        }
+	    $output = imagecreatetruecolor( $new_width, $new_height);
+	    
+	    //to preserve PNG transparency
+	    if($ext == "png")
+	    {
+	        //saving all full alpha channel information
+	        imagesavealpha($output, true);
+	        //setting completely transparent color
+	        $transparent = imagecolorallocatealpha($output, 0, 0, 0, 127);
+	        //filling created image with transparent color
+	        imagefill($output, 0, 0, $transparent);
+	    }
+
+	    imagecopyresampled( $output, $source,  $dst_x, $dst_y, $src_x, $src_y, 
+	                        $new_width-2*$dst_x, $new_height-2*$dst_y, 
+	                        $width-2*$src_x, $height-2*$src_y);
+	    //free resources
+	    ImageDestroy($source);
+
+	    //output image
+	    header('Content-Disposition: inline');
+	    header('Content-Type: image/'.$ext);
+	    $func = "image".$ext;
+	    $func($output); 
+	    
+	    //free resources
+	    ImageDestroy($output);
+		exit();
+	}
+
+	
+	view_image();
+	
 ```

index.php

@@ -1,6 +1,6 @@
 <?php
 	/**
-	 * View image header
+	 * View image dynamically
 	 * 
 	 * @return mixed
 	 */