个回答

• yvsh

  2016-10-28 13:23:58

  已采纳

  <?php
  class Image {
      /*图片的基本信息*/
      private $info;
      /*构造函数,打开图片,读取到内存中*/
      public function __construct($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);
      }
  
     /*操作图片(压缩)*/
      public function thumb($width,$height){
          //1.在内存中建立一个真色彩图片
          $image_thumb = imagecreatetruecolor($width,$height);
          //2.核心步骤,将原图复制到新建的真色彩图片上,并且按照一定比例压缩
          imagecopyresampled($image_thumb,$this->image,0,0,0,0,$width,$height,$this->info['width'],$this->info['height']);
          //3.销毁原始图片
          imagedestroy($this->image);
          $this->image = $image_thumb;
      }
  
      /*操作图片(添加文字水印)*/
      public function fontmark($content,$font_url,$size,$color,$local,$angle){
          //设置字体的颜色和透明度,参数1 内存中的图片 2 red 3 gleen 4 bule 5 透明度
          $col = imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]);
          //写入文件
          imagettftext($this->image,$size,$angle,$local['x'],$local['y'],$col,$font_url,$content);
      }
  
      /*操作图片(添加图片水印)*/
      public function imageMark($source,$local,$alpha){
          $info2 = getimagesize($source);
          $type2 = image_type_to_extension($info2[2],false);
          $fun2 = "imagecreatefrom{$type2}";
          $water = $fun2($source);
          imagecopymerge($this->image,$water,$local['x'],$local['y'],0,0,$info2[0],$info2[1],$alpha);
          imagedestroy($water);
      }
  
      /*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"]);
      }
  
      /*用析构函数销毁图片*/
      public function __destruct(){
          imagedestroy($this->image);
      }
  }
  
  

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• yvsh

  2016-10-28 13:24:34

  不是,可以参考php手册
  

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