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');
希望本文所述对大家PHP程序设计有所帮助。
