crop (rahasia lho)

<?php
if(isset($_POST['size'])){
    copy($_FILES['logo']['tmp_name'], '002.jpg');
    $s='<img src="002.jpg" /><br/><img src="002Resize.php?x='.$_POST['target']['x'].'&y='.$_POST['target']['y'].'">';


die($s);
}

if(isset($_GET['x'])){

    $img=getimagesize('002.jpg');
    $x1=$img[0]; $y1=$img[1];
    $x2=$_GET['x'];$y2=$_GET['y'];
    $c=array(1, $y2/$x2);
    $x3=$x1;
    $y3=round($x1*$c[1]);

    $x4=round($y1*$c[0] / $c[1]);
    $y4=$y1;

    if($x3<=$x1 && $y3 <= $y1){
      $x0=0;
      $y0=round(($y1-$y3 )/2);
      $wX=$x3; $wY=$y3;
    }

    if($x4<=$x1 && $y4 <= $y1){
      $x0=round(($x1-$x4 )/2);
      $y0=0;
      $wX=$x4; $wY=$y4;
    }
    //die ("   0,0, $x0,$y0, $x2,$y2, $wX,$wY ");
    $im = imagecreatetruecolor($x2, $y2);
    $im0 = imagecreatefromjpeg("002.jpg");
    //$wX=$x2; $wY=$y2;
    //$x0=($x1-$x2) /2 ; $y0=($y1-$y2) / 2;

    header('Content-type: image/jpeg');
    imagecopyresized ( $im, $im0, 0,0, $x0,$y0, $x2,$y2, $wX,$wY);

    imagejpeg($im);

    die();
}

?>
<form id='gbr' method="post" enctype="multipart/form-data">
<input name='size' value='1' type='hidden' />
<!-- size asal X <input name='source[x]' /> Y <input name='source[y]' />-->
upload : <input type=file name='logo' />
<br/>
size tujuan X <input name='target[x]' value='50' /> <br/>Y <input name='target[y]' value='50' /><br/>
<button id='generate'>Cari</button>
</form>