<?php
define("MAX_SIZE" , "400");
$filename = $_FILES['file']['name'];
$tmpname = $_FILES['file']['tmp_name'];
$explode = explode('.' , $filename);
$extension = strtolower(end($explode));
if($extension == 'jpg' || $extension == 'jpeg' || $extension == 'png' || $extension == 'gif')
    {
        $size = filesize($tmpname);
           if($extension == "jpg" || $extension == "jpeg" )
           {
             $uploadedfile = $_FILES['file']['tmp_name'];
             $src = imagecreatefromjpeg($uploadedfile);
             list($width , $height) = getimagesize($uploadedfile);
             $r = $width / $height;

             //$newwidth=600;
             //$newheight=($height/$width)*$newwidth;
             $tmp = imagecreatetruecolor($newwidth,$newheight);
             imagecopyresampled($tmp , $src , 0 , 0 , 0 , 0 , $newwidth , $newheight , $width , $height);
             $name = rand(0,100000000) . $_FILES['file']['name'];
             imagejpeg($tmp,$name,100);
             imagedestroy($src);
             imagedestroy($tmp);
             echo $name;
           }
           if($extension == "png")
           {
            $uploadedfile = $_FILES['file']['tmp_name'];
            $src = imagecreatefrompng($uploadedfile);
            list($width , $height) = getimagesize($uploadedfile);
             $newwidth=600;
             $newheight=($height/$width)*$newwidth;
             $tmp = imagecreatetruecolor($newwidth,$newheight);
             imagecopyresampled($tmp , $src , 0 , 0 , 0 , 0 , $newwidth , $newheight , $width , $height);
             $name = rand(0,100000000) . $_FILES['file']['name'];
             imagepng($tmp,$name,9);
             imagedestroy($src);
             imagedestroy($tmp);
             echo $name;
           }
           if($extension == "gif")
           {
            $uploadedfile = $_FILES['file']['tmp_name'];
            $src = imagecreatefromgif($uploadedfile);
            list($width , $height) = getimagesize($uploadedfile);
             $newwidth=600;
             $newheight=($height/$width)*$newwidth;
             $tmp = imagecreatetruecolor($newwidth,$newheight);
             imagecopyresampled($tmp , $src , 0 , 0 , 0 , 0 , $newwidth , $newheight , $width , $height);
             $name = rand(0,100000000) . $_FILES['file']['name'];
             imagegif($tmp,$name,100);
             imagedestroy($src);
             imagedestroy($tmp);
             echo $name;
           }

           }
    else
    {
        die('Format not supported');
    }
?>