PHP class to generate thumbnails_PHP tutorial

PHP code

/**

* Function: Generate thumbnails

* Author: phpox

* Date: Thu May 17 09:57:05 CST 2007

*/

class CreatMiniature

{

//Public variables

var $srcFile=""; //Original image

var $echoType; //Output image type, link--do not save as file; file--save as File

var $im=""; //Temporary variable

var $srcW=""; //Original image width

var $srcH=""; / /Original image height

//Set variables and initialization

function SetVar($srcFile,$echoType)

{

if (!file_exists($ srcFile)){

echo 'The source image file does not exist!';

exit();

}

$this->srcFile= $srcFile;

$this->echoType=$echoType;

$info = "";

$data = GetImageSize($this->srcFile,$ info);

switch ($data[2])

{

case 1:

if(!function_exists("imagecreatefromgif")){

echo "Your GD library cannot use GIF format images, please use Jpeg or PNG format!Return" ;

exit();

}

$this->im = ImageCreateFromGIF($this->srcFile);

break;

case 2:

if(!function_exists("imagecreatefromjpeg")){

echo "Your GD library cannot use images in jpeg format, please use images in other formats ! return";

exit();

}

$ this->im = ImageCreateFromJpeg($this->srcFile);

break;

case 3:

$this->im = ImageCreateFromPNG($this ->srcFile);

break;

}

$this->srcW=ImageSX($this->im);

$this->srcH=ImageSY($this->im);

}

//Generate distorted thumbnails

function Distortion($toFile,$ toW,$toH)

{

$cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$ this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

//Generate scaled thumbnails

function Prorate($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH<=$srcWH)

{

$ftoW=$toW;

$ftoH=$ftoW*($this->srcH/$this->srcW);

}

else

{

$ftoH=$toH;

$ftoW=$ftoH*($this->srcW/$this- >srcH);

}

if($this->srcW>$toW||$this->srcH>$toH)

{

$cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

else

{

$cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$ this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

}

//Generate the minimum cropped thumbnail

function Cut($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ctoH=$toH;

$ctoW=$ctoH*($this->srcW/$this->srcH) ;

}

else

{

$ctoW=$toW;

$ctoH=$ctoW*($this- >srcH/$this->srcW);

}

$allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0, 0,0,0,$this->srcW,$this->srcH);

$cImg=$this->CreatImage($allImg,$toW,$toH,0,0, ($ctoW-$toW)/2,($ctoH-$toH)/2,$toW,$toH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

ImageDestroy($allImg);

}

//Generate thumbnail with background fill

function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH<=$srcWH)

{

$ ftoW=$toW;

$ftoH=$ftoW*($this->srcH/$this->srcW);

}