<?php
class Image{
/**
*内存中的图片
*/
private $image;
/**
*图片的基本信息
*/
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']}";
$image=$fun($src);
}
/*
*操作图片（压缩）
*/
public function thumb($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;
}
/*
*在浏览器中输出图片
*/
public function show()
{
header("Content-type:".$this->info['mime']);
$funs="image{$this->info['type']}";
$funs=($this->image);
}
/*
*把图片保存到硬盘里
*/
public function save($newname)
{
$funs="image{$this->info['type']}";
$funs($this->image,$newname.'.'.$this->info['type']);
}
/*
*销毁内存中的图片
*/
public function __destruct()
{
imagedestroy($this->image);
}
}
?>
