Encapsulation class implementation for adding, compressing, and cutting PHP image watermarks,

Encapsulation class implementation for adding, compressing, and cutting PHP image watermarks, _PHP tutorial

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Release： 2016-07-13 16:54:01

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PHP encapsulation class implementation for adding, compressing, and cutting image watermarks.

PHP mainly uses the GD library extension to operate image files. When we frequently use PHP to operate images, we will naturally encapsulate many functions, otherwise we will write too much repetitive code. When there are many functions related to pictures, we can consider organizing these functions, so we have the idea of encapsulating them into classes.
There are four main steps to operate pictures:
1. Open the picture
2. Operation pictures
3. Output pictures
4. Destroy pictures
Steps 1, 3, and 4 must be written every time, and they are almost the same every time. The only step that really needs to be changed is the image manipulation step. Manipulating pictures is often done through one or more main GD functions.

<&#63;php 

class Image
{  
  private $info;

  private $image;
  public $type;
  public function __construct($src)
  {

    $this->info=getimagesize($src);
    $this->type=image_type_to_extension($this->info['2'],false);
    $fun="imagecreatefrom{$this->type}";
    $this->image=$fun($src);
  }
  /**
   * 文字水印
   * @param [type] $font   字体
   * @param [type] $content 内容
   * @param [type] $size   文字大小
   * @param [type] $col   文字颜色（四元数组）
   * @param array  $location 位置 
   * @param integer $angle  倾斜角度
   * @return [type]      
   */
  public function fontMark($font,$content,$size,$col,$location,$angle=0){
    $col=imagecolorallocatealpha($this->image, $col['0'], $col['1'], $col['2'],$col['3']);

    imagettftext($this->image, $size, $angle, $location['0'], $location['1'], $col,$font,$content);
  }
  
  /**
   * 图片水印
   * @param [type] $imageMark 水印图片地址
   * @param [type] $dst    水印图片在原图片中的位置
   * @param [type] $pct    透明度
   * @return [type]      
   */
  public function imageMark($imageMark,$dst,$pct){
    $info2=getimagesize($imageMark);
    $type=image_type_to_extension($info2['2'],false);
    $func2="imagecreatefrom".$type;
    $water=$func2($imageMark);

    imagecopymerge($this->image, $water, $dst[0], $dst[1], 0, 0, $info2['0'], $info2['1'], $pct);
    imagedestroy($water);

  }
  /**
   * 压缩图片
   * @param [type] $thumbSize 压缩图片大小
   * @return [type]      [description]
   */
  public function thumb($thumbSize){
    $imageThumb=imagecreatetruecolor($thumbSize[0], $thumbSize[1]);
    
    imagecopyresampled($imageThumb, $this->image, 0, 0, 0, 0, $thumbSize[0], $thumbSize[1], $this->info['0'], $this->info['1']);
    imagedestroy($this->image);
    $this->image=$imageThumb;
  }
  /**
  * 裁剪图片
   * @param [type] $cutSize 裁剪大小
   * @param [type] $location 裁剪位置
   * @return [type]      [description]
   */
   public function cut($cutSize,$location){
     $imageCut=imagecreatetruecolor($cutSize[0],$cutSize[1]);

     imagecopyresampled($imageCut, $this->image, 0, 0, $location[0], $location[1],$cutSize[0],$cutSize[1],$cutSize[0],$cutSize[1]);
     imagedestroy($this->image);
     $this->image=$imageCut;
   }
  /**
   * 展现图片
   * @return [type] [description]
   */
  public function show(){
    header("content-type:".$this->info['mime']);

    $funn="image".$this->type;

    $funn($this->image);
  }
  /**
   * 保存图片
 * @param [type] $newname 新图片名
 * @return [type]     [description]
 */
   public function save($newname){
     header("content-type:".$this->info['mime']);

     $funn="image".$this->type;

     $funn($this->image,$newname.'.'.$this->type);
   }
   public function __destruct(){
     imagedestroy($this->image);
   }

 }

 &#63;>

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Is it very simple to operate like this? If you need other operations, just add them to this class~~ I hope everyone can master it.