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PHP开发的文字水印,缩略图,图片水印实现类与用法示例

更新时间:2020-04-04 10:51:52 作者:startmvc
本文实例讲述了PHP开发的文字水印,缩略图,图片水印实现类与用法。分享给大家供大家参

本文实例讲述了PHP开发的文字水印,缩略图,图片水印实现类与用法。分享给大家供大家参考,具体如下:

1.实现类ImageToTest.class.php参考代码


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);
 }
}

2.测试参考代码


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');

PHP 文字水印 缩略图 图片水印 实现类