PHP-Generated thumbnails class _php tutorial

PHP code

/**

* Function: Generate thumbnail image

* Author: phpox

* Date: Thu 09:57:05 CST 2007

*/

Class Creatminiature

{

Public variables

var $srcFile = ""; Original

var $echoType; Output picture type, link--not saved as file; file--saved as File

var $im = ""; Temp variable

var $srcW = ""; Original width

var $srcH = ""; Original height

Setting variables and initialization

function SetVar ($srcFile, $echoType)

{

if (!file_exists ($srcFile)) {

echo Source picture 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 pictures, please use JPEG or PNG format!" Return ";

Exit ();

}

$this->im = imagecreatefromgif ($this->srcfile);

Break

Case 2:

if (!function_exists ("Imagecreatefromjpeg")) {

echo "Your GD library can not use JPEG format pictures, please use other format pictures!" 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);

}

To create a distorted shape thumbnail

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);

}

To generate a proportionally scaled thumbnail

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 smallest cropped thumbnail

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

{

$toWH = $toW/$toH;

$srcWH = $this->srcw/$this-&g

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