一个高手写的类，经过修改功能更强
<?php
/**
*version 1.0
*@author sanshi
*QQ: 35047205
*MSN: sanshi0815@tom.com
*Create 2005/6/18
*******************************************************
*@param string $srcFile
*@param string $dstFile
*@param string $fileType
*@param string $im
*@param array $imgType
*/
class MakeMiniature
{
var $srcFile;
var $dstFile;
var $fileType;
var $im;
var $imgType=array("jpg",
"JPG",
"gif",
"png",
"bmp");
/**
*@param string $fileName
*@return boolean
*/
function findType($fileName)
{
$type=pathinfo($fileName);
$var=$type['extension'];
for($i=0;$i<=count($this->imgType);$i++)
{
if(Strcmp($this->imgType[$i],$var)==0)
{
$this->fileType=$var;
return true;
}
}
return false;
}
/**
*@param $fileType
*@return resource
*/
function loadImg($fileType)
{
$type=$this->isNull($fileType);
switch($type)
{
case "jpg":
$im=ImageCreateFromjpeg($this->srcFile);
break;
case "JPG":
$im=ImageCreateFromjpeg($this->srcFile);
break;
case "gif":
$im=ImageCreateFromGIF($this->srcFile);
break;
case "png":
$im=imagecreatefrompng($this->srcFile);
break;
case "bmp":
$im=imagecreatefromwbmp($this->srcFile);
break;
default:
$im=0;
echo "not you input file type!<br>";
break;
}
$this->im=$im;
return $im;
}
/**
*/
function isNull($var)
{
if(!isset($var)||empty($var))
{
echo "！<br>";
exit(0);
}
return $var;
}
/**
*@param string srcFile
*@param String dstFile
*/
function setParam($srcFile,$dstFile)
{
$this->srcFile=$this->isNull($srcFile);
$this->dstFile=$this->isNull($dstFile);
if(!$this->findType($srcFile))
{
echo "file type error!asdfas";
}
if(!$this->loadImg($this->fileType))
{
echo "open ".$this->srcFile."error!<br>";
}
}
/**
*@param resource im
*@return int width
*/
function getImgWidth($im)
{
$im=$this->isNull($im);
$width=imagesx($im);
return $width;
}
/**
*@param resource im
*@return int height
*/
function getImgHeight($im)
{
$im=$this->isNull($im);
$height=imagesy($im);
return $height;
}
/**
*@param resource im
*@param int scale
*@param boolean page
*/
function createImg($im,$scale,$page)
{
$im=$this->isNull($im);
$scale=$this->isNull($scale);
$srcW=$this->getImgWidth($im);
$srcH=$this->getImgHeight($im);
$detW=round($srcW*$scale/100);
$detH=round($srcH*$scale/100);
//$om=ImageCreate($detW,$detH);
$om=imagecreatetruecolor($detW,$detH);
//ImageCopyResized($om,$im,0,0,0,0,$detW,$detH,$srcW,$srcH);
imagecopyresampled($om,$im,0,0,0,0,$detW,$detH,$srcW,$srcH);
$this->showImg($om,$this->fileType,$page);
}
/**
*@param resource im
*@param int scale
*@param boolean page
*/
function createNewImg($im,$width,$height,$page)
{
$im=$this->isNull($im);
//$scale=$this->isNull($scale);
$srcW=$this->getImgWidth($im);
$srcH=$this->getImgHeight($im);
$detW=$this->isNull($width);
$detH=$this->isNull($height);
//$om=ImageCreate($detW,$detH);
$om=imagecreatetruecolor($detW,$detH);
//ImageCopyResized($om,$im,0,0,0,0,$detW,$detH,$srcW,$srcH);
imagecopyresampled($om,$im,0,0,0,0,$detW,$detH,$srcW,$srcH);
$this->showImg($om,$this->fileType,$page);
}
/**
*@param boolean boolean
*/
function inputError($boolean)
{
if(!$boolean)
{
echo "img input error!<br>";
}
}
/**
*@param resource $om
*@param String $type
*@param boolean $page
*/
function showImg($om,$type,$page)
{
$om=$this->isNull($om);
$type=$this->isNull($type);
switch($type)
{
case "jpg":
if($page)
{
$suc=imagejpeg($om);
$this->inputError($suc);
}else{
$suc=imagejpeg($om,$this->dstFile);
$this->inputError($suc);
}
break;
case "JPG":
if($page)
{
$suc=imagejpeg($om);
$this->inputError($suc);
}else{
$suc=imagejpeg($om,$this->dstFile);
$this->inputError($suc);
}
break;
case "gif":
if($page)
{
$suc=imagegif($om);
$this->inputError($suc);
}else{
$suc=imagegif($om,$this->dstFile);
$this->inputError($suc);
}
break;
case "png":
if($page)
{
$suc=imagepng($om);
$this->inputError($suc);
}else{
$suc=imagepng($om,$this->dstFile);
$this->inputError($suc);
}
break;
case "bmp":
if($page)
{
$suc=imagewbmp($om);
$this->inputError($suc);
}else{
$suc=imagewbmp($om,$this->dstFile);
$this->inputError($suc);
}
break;
default:
echo "not you input file type!<br>";
break;
}
}
}
?>
<?php
include('MakeMiniature.class.php');
$file=new MakeMiniature();
$file->setParam("img/logo.jpg","img/logo1.jpg");//设置源文件，跟生成文件
//$file->createImg($file->im,50,true);//按比例生成图象，比例为200%，在页面上显示
$file->createImg($file->im,50,false);//按比例生成图象，比例为200%，生成图片保存到上面设置的名字和路径
//$file->createNewImg($file->im,100,100,true);//按照自己设计的长宽生成图象，保存或者显示在页面上
?>
