Upload Image Resizer

[doditsuprianto]

Anda mungkin pernah mengalami kendala. Bagaimana caranya mengupload file gambar ukuran besar selanjutnya diupload dengan mekanisme penggunaan form, yang selanjutnya disimpan di server dalam kondisi ukuran yang lebih kecil atau istilahnya adalah Thumbnail image?

Pada kesempatan kali ini saya membuat class merubah ukuran image yang sangat mudah penggunaannya. Dimana di dalamnya terdapat fitur untuk mengatur ukuran lebar atau panjang secara proporsional, atau bisa juga Anda memaksa ukuran panjang dan lebar sesuai keinginan meskipun rasionya kurang tepat.

Penjelasan selengkapnya ada di http://doditsuprianto.com

Download lengkap kode (http://doditsuprianto.com/ImageResizer/ImageResizer.zip)

<?php
/**
* @author Dodit Suprianto
* Email: d0dit@yahoo.com
* Website: http://doditsuprianto.com
*
* Nama file: ImageResize.inc
*
* This class to resize an image from bigger to smaller size.
* Supporting PNG, JPG, and GIF image format.
*
* if you chose $proportional=true, it means that width or height image is proportional, example:
* $r = new Resize("test.jpg", 0, 500, true); height image will be 500 pixel and width will be proportional
* $r = new Resize("test.jpg", 500, 0, true); width image will be 500 pixel and height will be proportional
*
* if you chose $proportional=false, it means the width and height image will be customizable, example:
* $r = new Resize("test.jpg", 500, 500, true); it forces the image size will be 500 pixel width and 500 pixel height
*
*/

class Resize
{
private $file_source;
private $width_resize;
private $height_resize;
private $proportional;

public function __construct($file_source, $width_resize, $height_resize, $proportional)
{
$this->file_source = $file_source;
$this->width_resize = $width_resize;
$this->height_resize = $height_resize;
$this->proportional = $proportional;
}

public function setProportional($proportional)
{
$this->proportional = $proportional;
}

public function setFileSource($file_source)
{
$this->file_source = $file_source;
}

public function setHeightResize($height_resize)
{
$this->height_resize = $height_resize;
}

public function setWidthResize($width_resize)
{
$this->width_resize = $width_resize;
}

private function MemoryUsage()
{
$imageInfo = getimagesize($this->file_source);
$memoryNeeded = round(($imageInfo[0] * $imageInfo[1] * $imageInfo['bits'] * $imageInfo['channels'] / 8 + Pow(2, 16)) * 1.65);

$memoryLimit = (int) ini_get('memory_limit')*1048576;
if ((memory_get_usage() + $memoryNeeded) > $memoryLimit)
ini_set('memory_limit', ceil((memory_get_usage() + $memoryNeeded + $memoryLimit)/1048576).'M');
}

public function ImageResize()
{
$this->MemoryUsage();
if ( $this->height_resize <= 0 && $this->width_resize <= 0 ) return false;

$info = getimagesize($this->file_source);
$image = '';

$final_width = 0;
$final_height = 0;
list($width_old, $height_old) = $info;

if ($this->proportional)
{
$proportion = $width_old / $height_old;

if ( $this->width_resize > $this->height_resize && $this->height_resize != 0)
{
$final_height = $this->height_resize;
$final_width = $final_height * $proportion;
}
elseif ( $this->width_resize < $this->height_resize && $this->width_resize != 0)
{
$final_width = $this->width_resize;
$final_height = $final_width / $proportion;
}
elseif ( $this->width_resize == 0 )
{
$final_height = $this->height_resize;
$final_width = $final_height * $proportion;
}
elseif ( $this->height_resize == 0)
{
$final_width = $this->width_resize;
$final_height = $final_width / $proportion;
}
else
{
$final_width = $this->width_resize;
$final_height = $this->height_resize;
}
}
else
{
$final_width = ($this->width_resize <= 0) ? $this->width_resize_old : $this->width_resize;
$final_height = ($this->height_resize <= 0) ? $this->height_resize_old : $this->height_resize;
}

switch ( $info[2] )
{
case IMAGETYPE_GIF:
$image = imagecreatefromgif($this->file_source);
break;
case IMAGETYPE_JPEG:
$image = imagecreatefromjpeg($this->file_source);
break;
case IMAGETYPE_PNG:
$image = imagecreatefrompng($this->file_source);
break;
default:
return false;
}

$image_resized = imagecreatetruecolor( $final_width, $final_height );
imagecolortransparent($image_resized, imagecolorallocate($image_resized, 0, 0, 0) );
imagealphablending($image_resized, false);
imagesavealpha($image_resized, true);

imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);

switch ( $info[2] )
{
case IMAGETYPE_GIF:
imagegif($image_resized, time().".gif", 100);
break;
case IMAGETYPE_JPEG:
imagejpeg($image_resized, time().".jpg", 100);
break;
case IMAGETYPE_PNG:
imagepng($image_resized, time().".png", 100);
break;
default:
return false;
}
return true;
}
}
?>



<html>

<head>
<title>Image Resize</title>
</head>

<body>

<form enctype="multipart/form-data" method="POST" action="<?php echo $_SERVER['SELF'];?>">
Photo: <input type=file name=photo size="20"><br>
Proportional: <input type="radio" value="yes" checked name="R1"> <input type="radio" value="no" name="R1"><br>
Width: <input type="text" name="width" size="20"><br>
Height: <input type="text" name="height" size="20"><br>
<input type="submit" name="submit" value="Resize">
</form>

<?php
if ($_POST['submit'])
{
require_once("ImageResize.inc");

if ($_POST['R1'] == "yes")
{
// proportional
$r = new Resize($_FILES['photo']['tmp_name'], $_POST['width'], 0, true);
// or $r = new Resize($_FILE['photo']['tmp_name'], 0, $_POST['height'], true);
} else
{
// Force the image size
$r = new Resize($_FILES[photo][tmp_name], $_POST[width], $_POST[height], false);
}
$r->ImageResize();
}
?>

</body>

</html>

[Eclipse]

Another usefull tut bro..... :top