PHP圖像操作類

PHP圖像操作的一個類，包括給圖像添加文字水印、圖像水印和壓縮圖片。

    <?php


class Image {  

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


    /** 
    * 打開圖片，寫入內存 
    * 
    **/  
    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);  
    }  

    //縮略圖  
    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);  
    }  

    //圖片水印  
    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);  
    }  

    //在瀏覽器中顯示  
    public function show()  
    {  
        header("Content-type:".$this->info['mime']);  
        $fun = "image".$this->type;  
        $fun($this->image);  
    }  

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

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