PHP图像操作类

基于已给出的各种图像操作方法，这里我总结出了PHP图像操作的一个类，包括给图像添加文字水印、图像水印和压缩图片。读者可自行添加功能。

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);	}}

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