PHP开发的文字水印，缩略图，图片水印实现类与用法示例

class ImageToTest {  /**   * 图片的基本信息   */  private $info;  private $image;  public function __construct($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){    $image_thumb = imagecreatetruecolor($width,$height);    imagecopyresampled($image_thumb,$this->image,0,0,0,0,$width,$height,      $this->info['width'],$this->info['height']);    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){    $col = imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]);    imagettftext($this->image,$size,$angle,$local['x'],$local['y'],$col,$font_url,$content);  }  /**   * 操作图片（添加水印图片）   */  public function imageMark($source,$local,$alpha){    //1.获取水印图片的基本信息    $info2 = getimagesize($source);    //2.通过水印的图片编号来获取水印的图片类型    $type2 = image_type_to_extension($info2[2],false);    //3.在内存中创建一个和我们的水印图像一致的图像类型    $func2 = "imagecreatefrom{$type2}";    //4.把水印图片复制到内存中    $water = $func2($source);    //5.合并图片    imagecopymerge($this->image,$water,$local['x'],$local['y'],0,0,$info2[0],$info2[1],$alpha);    //6.销毁水印图片    imagedestroy($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,'./outPut/'.$newName.'.'.$this->info['type']);  }  /**   * 销毁图片 使用析构函数   */  public function __destruct()  {    imagedestroy($this->image);  }}

require_once('ImageToTest.class.php');/*$src = './image/wbg.jpg';$image = new ImageToTest($src);$image->thumb(700,550);$image->show();*//*$src2 = './image/wbg.jpg';$content = 'SGC';$font_url = './image/YGYcuhei.ttf';$size = 33;$color = array(  0=>2,  1=>222,  2=>222,  3=>60);$local = array(  'x'=>20,  'y'=>100);$angle = 10;$image2 = new ImageToTest($src2);$image2->fontMark($content,$font_url,$size,$color,$local,$angle);$image2->show();$image2->save('hahahah');*/$src3 = './image/wbg.jpg';$source = './image/water.jpg';$local = array(  'x'=>20,  'y'=>100);$font_url = './image/YGYcuhei.ttf';$size = 38;$color = array(  0=>2,  1=>222,  2=>222,  3=>60);$alpha = 60;$angle = 50;$image3 = new ImageToTest($src3);$image3->imageMark($source,$local,$alpha);$image3->thumb(700,550);$image3->fontMark('Hello',$font_url,$size,$color,$local,$angle);$image3->show();$image3->save('WAWAWAWAWA');