PHP开发的文字水印,缩略图,图片水印实现类与用法示例
这篇文章主要介绍了PHP开发的文字水印,缩略图,图片水印实现类与用法,结合完整实例形式分析了php文字水印、缩略图操作类定义与简单使用方法,需要的朋友可以参考下。
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');