PHP图像操作类

<?php

class Image {

private $info;
private $type;
private $iamge;

/**
* 打开图片，写入内存
*
**/
public function __construct($src)
{
$this->info = getimagesize($src);
$this->type = image_type_to_extension($this->info[2],false);
$fun = "imagecreatefrom".$this->type;
$this->image = $fun($src);
}

//缩略图
public function thumb($width, $height)
{
$image_thumb = imagecreatetruecolor($width, $height);
imagecopyresampled($image_thumb, $this->image, 0, 0, 0, 0, $width, $height, $this->info[0], $this->info[1]);
imagedestroy($this->image);
$this->image = $image_thumb;
}

//文字水印
public function fontMark($content, $fontUrl, $size, $color, $locate=array('x'=>0,'y'=>0), $angle=0)
{
$color = imagecolorallocatealpha($this->image, $color[0], $color[1], $color[2], $color[3]);
imagettftext($this->image, $size, $angle, $locate['x'], $locate['y'], $color, $fontUrl, $content);
}

//图片水印
public function imageMark($src,$locate,$alpha)
{
$info2 = getimagesize($src);
$type2 = image_type_to_extension($info2[2],false);
$fun2 = "imagecreatefrom".$type2;
$water = $fun2($src);
imagecopymerge($this->image, $water, $locate['x'], $locate['y'], 0, 0, $info2[0], $info2[1], $alpha);
imagedestroy($water);
}

//在浏览器中显示
public function show()
{
header("Content-type:".$this->info['mime']);
$fun = "image".$this->type;
$fun($this->image);
}

//保存为文件
public function save($newname)
{
$fun = "image".$this->type;
$fun($this->image, $newname.'.'.$this->type);
}

public function __destruct()
{
imagedestroy($this->image);
}
}