<?php

class Image{

//内存中的图片

private $image;

//图片基本信息

private $info;

/**

*打开一张图片，读取到内存中

**/

public function __construct($src){

$info=getimagesize($src);

$this->info=array(

'width'=>$info[0],

'height'=>$info[1],

'type'=>image_type_to_extension($info[2],false),

'mime'=>$info['mime']

);

$fun="imagecreatefrom{$this->info['type']}";

$this->image=$fun($src);

}

/**

*压缩图片

*/

public function thumb($width,$height){

$image_thumb=imagecreatetruecolor($width,$height);

imagecopyresampled($image_thumb,$this->image,0,0,0,0,$width,$height,$this->info['$width'],$this->info['$height']);

imagedestroy($this->image);

$this->image=$image_thumb;

}

/**

*浏览器显示图片

*/

public function show(){

header("Content-type: " . $this->info['mime']);

$funs="image{$this->info['type']}";

$funs($this->image);

}

/**

*保存图片

*/

public function save(){

$funs="image{$this->info['type']}";

$funs($this->image,$newname.'.'.$this->info['type']);

}

/**

*销毁图片

*/

public function __destruct(){

imagedestroy($this->image);

}

}

?>