class cropImage{

    var $imgSrc,$myImage,$cropHeight,$cropWidth,$x,$y,$thumb;



    function setImage($image)

    {

       $this->imgSrc = $image;

       list($width, $height) = getimagesize($this->imgSrc);

       $this->myImage = imagecreatefromjpeg($this->imgSrc) or die("Hiba: Nem találom a képet!");

           if($width > $height) $biggestSide = $width;

           else $biggestSide = $height;

       $cropPercent = .5;

       $this->cropWidth   = $biggestSide*$cropPercent;

       $this->cropHeight  = $biggestSide*$cropPercent;

       $this->x = ($width-$this->cropWidth)/2;

       $this->y = ($height-$this->cropHeight)/2;



    }



    function createThumb()

    {

      $thumbSize = 250;

      $this->thumb = imagecreatetruecolor($thumbSize, $thumbSize);

      imagecopyresampled($this->thumb, $this->myImage, 0, 0,$this->x, $this->y, $thumbSize, $thumbSize, $this->cropWidth, $this->cropHeight);

    }



    function renderImage()

    {

       header('Content-type: image/jpeg');

       imagejpeg($this->thumb);

       imagedestroy($this->thumb);

    }

}



$image = new cropImage;

$image->setImage($_GET['src']);

$image->createThumb();

$image->renderImage();  

<input type="email" name="email" placeholder="E-mail cím" />