уменьшение картинки без потери качества

$change="";

$abc="";

 

 

 define ("MAX_SIZE","400");

 function getExtension($str) {

         $i = strrpos($str,".");

         if (!$i) { return ""; }

         $l = strlen($str) - $i;

         $ext = substr($str,$i+1,$l);

         return $ext;

 }

 

 $errors=0;

 

 if($_SERVER["REQUEST_METHOD"] == "POST")

 {

        $image =$_FILES["file"]["name"];

        $uploadedfile = $_FILES['file']['tmp_name'];

     

 

        if ($image)

        {

       

                $filename = stripslashes($_FILES['file']['name']);

       

                $extension = getExtension($filename);

                $extension = strtolower($extension);

               

               

 if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif"))

                {

               

                        $change='<div class="msgdiv">Unknown Image extension </div> ';

                        $errors=1;

                }

                else

                {

 

 $size=filesize($_FILES['file']['tmp_name']);

 

 

if ($size > MAX_SIZE*1024)

{

        $change='<div class="msgdiv">You have exceeded the size limit!</div> ';

        $errors=1;

}

 

 

if($extension=="jpg" || $extension=="jpeg" )

{

$uploadedfile = $_FILES['file']['tmp_name'];

$src = imagecreatefromjpeg($uploadedfile);

 

}

else if($extension=="png")

{

$uploadedfile = $_FILES['file']['tmp_name'];

$src = imagecreatefrompng($uploadedfile);

 

}

else

{

$src = imagecreatefromgif($uploadedfile);

}

 

echo $scr;

 

list($width,$height)=getimagesize($uploadedfile);

 

 

$newwidth=200;

$newheight=($height/$width)*$newwidth;

$tmp=imagecreatetruecolor($newwidth,$newheight);

 

 

imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);

 

$filename = "imgs/".time(). $_FILES['file']['name'];

 

 

 

 

imagejpeg($tmp,$filename,100);

 

 

 

imagedestroy($src);

imagedestroy($tmp);

 

}}

 

}

 

 

 function getExtension1($str1) {

         $i = strrpos($str1,".");

         if (!$i) { return ""; }

         $l = strlen($str1) - $i;

         $ext = substr($str1,$i+1,$l);

         return $ext;

 }

 

 $errors1=0;

 

 if($_SERVER["REQUEST_METHOD"] == "POST")

 {

        $image1 =$_FILES["file"]["name"];

        $uploadedfile1 = $_FILES['file1']['tmp_name'];

     

 

        if ($image1)

        {

       

                $filename1 = stripslashes($_FILES['file1']['name']);

       

                $extension1 = getExtension1($filename1);

                $extension1 = strtolower($extension1);

               

               

 if (($extension1 != "jpg") && ($extension1 != "jpeg") && ($extension1 != "png") && ($extension1 != "gif"))

                {

               

                        $change1='<div class="msgdiv">Unknown Image extension </div> ';

                        $errors1=1;

                }

                else

                {

 

 $size1=filesize($_FILES['file1']['tmp_name']);

 

 

if ($size1 > MAX_SIZE*1024)

{

        $change1='<div class="msgdiv">You have exceeded the size limit!</div> ';

        $errors1=1;

}

 

 

if($extension1=="jpg" || $extension1=="jpeg" )

{

$uploadedfile1 = $_FILES['file1']['tmp_name'];

$src1 = imagecreatefromjpeg($uploadedfile1);

 

}

else if($extension1=="png")

{

$uploadedfile1 = $_FILES['file1']['tmp_name'];

$src1 = imagecreatefrompng($uploadedfile1);

 

}

else

{

$src1 = imagecreatefromgif($uploadedfile1);

}

 

echo $scr1;

 

list($width1,$height1)=getimagesize($uploadedfile1);

 

 

$newwidth1=260;

$newheight1=($height1/$width1)*$newwidth1;

$tmp1=imagecreatetruecolor($newwidth1,$newheight1);

 

 

imagecopyresampled($tmp1,$src1,0,0,0,0,$newwidth1,$newheight1,$width1,$height1);

 

$filename1 = "imgs/".time(). $_FILES['file1']['name'];

 

 

 

 

imagejpeg($tmp1,$filename1,100);

 

 

 

imagedestroy($src1);

imagedestroy($tmp1);

 

}}

 

}