<?php
/**
* class Image2Thumbnail
* Thumbnail creation with PHP4
*
*
* @author Andreas Martens <heyn@plautdietsch.de>
* @version 0.9
*/
class Img2Thumb {
/**
* Constructor - requires following vars:
*
* @param string $filename image path
*
* These are additional vars:
*
* @param int $newxsize new maximum image width
* @param int $newysize new maximum image height
* @param string $fileout output image path
*
*/
function Img2Thumb($filename, $newxsize=60,$newysize=60, $fileout='') {
global $HTTP_POST_VARS, $HTTP_GET_VARS, $HTTP_COOKIE_VARS;
if (isset($HTTP_COOKIE_VARS)) $httpvars = $HTTP_COOKIE_VARS;
else if (isset($HTTP_POST_VARS)) $httpvars = $HTTP_POST_VARS;
else if (isset($HTTP_GET_VARS)) $httpvars = $HTTP_GET_VARS;
$this -> NewImgCreate($filename,$newxsize,$newysize,$fileout);
}
/**
*
* private function - do not call
*
*/
function NewImgCreate($filename,$newxsize,$newysize,$fileout) {
$type = $this->GetImgType($filename);
if ($type=="png") {
$orig_img = imagecreatefrompng($filename);
}
if ($type=="jpg") {
$orig_img = imagecreatefromjpeg($filename);
}
$new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);
if (!empty($fileout)) {
$this-> NewImgSave($new_img,$fileout,$type);
}
else {
$this->NewImgShow($new_img,$type);
}
ImageDestroy($new_img);
ImageDestroy($orig_img);
}
/**
*
* private function - do not call
*
*/
function NewImgResize($orig_img,$newxsize,$newysize,$filename) {
$orig_size = getimagesize($filename);
if ($orig_size[0]<$orig_size[1]){
$newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
}
else{
$newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
}
$im_out = ImageCreate($newxsize,$newysize);
ImageCopyResized($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize, $orig_size[0], $orig_size[1]);
return $im_out;
}
/**
*
* private function - do not call
*
*/
function NewImgSave($new_img,$fileout,$type) {
if ($type=="png") {
if (substr($fileout,strlen($fileout)-4,4)!=".png")
$fileout .= ".png";
return imagepng($new_img,$fileout);
}
if ($type=="jpg") {
if (substr($fileout,strlen($fileout)-4,4)!=".jpg")
$fileout .= ".jpg";
return imagejpeg($new_img,$fileout);
}
}
/**
*
* private function - do not call
*
*/
function NewImgShow($new_img,$type) {
if ($type=="png") {
header ("Content-type: image/png");
return imagepng($new_img);
}
if ($type=="jpg") {
header ("Content-type: image/jpeg");
return imagejpeg($new_img);
}
}
/**
*
* private function - do not call
*
*/
function GetImgType($filename) {
$size = getimagesize($filename);
if($size[2]==2) return "jpg";
elseif($size[2]==3) return "png";
}
}
?>
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