php图片添加文字水印实现代码_PHP

WBOY
Release: 2016-05-27 10:36:14
Original
981 people have browsed it

php类库给现有的图片加文字水印,代码不是很完善,欢迎大家多多指教!代码如下:

<&#63;php
/*PHP图片加文字水印类库
QQ:3697578482 伤心的歌
该类库暂时只支持文字水印,位置为右下角,颜色随机
调用方法:
1、在需要加水印的文件顶部引入类库:
include_once 'imageClass.php';
2、声明新类:
$tpl=new image_fu;
3、给图片水印提供参数:
$tpl->img(图片路径,水印文字,字体路径,字体大小,字体角度);
比如:$tpl->img('abc.jpg','这是水印文字','ziti.ttf',30,0)
*/
class image_fu{
private $image;
private $img_info;
private $img_width;
private $img_height;
private $img_im;
private $img_text;
private $img_ttf='';
private $img_new;
private $img_text_size;
private $img_jd;
function img($img='',$txt='',$ttf='',$size=12,$jiaodu=0){
if(isset($img)&&file_exists($img)){//检测图片是否存在
$this->image =$img;
$this->img_text=$txt;
$this->img_text_size=$size;
$this->img_jd=$jiaodu;
if(file_exists($ttf)){
$this->img_ttf=$ttf;
}else{
exit('字体文件:'.$ttf.'不存在!');
}
$this->imgyesno();
}else{
exit('图片文件:'.$img.'不存在');
}
}
private function imgyesno(){
$this->img_info =getimagesize($this->image);
$this->img_width =$this->img_info[0];//图片宽
$this->img_height=$this->img_info[1];//图片高
//检测图片类型
switch($this->img_info[2]){
case 1:$this->img_im = imagecreatefromgif($this->image);break;
case 2:$this->img_im = imagecreatefromjpeg($this->image);break;
case 3:$this->img_im = imagecreatefrompng($this->image);break;
default:exit('图片格式不支持水印');
}
$this->img_text();
}
private function img_text(){
imagealphablending($this->img_im,true);
//设定颜色
$color=imagecolorallocate($this->img_im,rand(0,255),rand(0,255),rand(0,255));
$txt_height=$this->img_text_size;
$txt_jiaodu=$this->img_jd;
$ttf_im=imagettfbbox($txt_height,$txt_jiaodu,$this->img_ttf,$this->img_text);
$w = $ttf_im[2] - $ttf_im[6];
$h = $ttf_im[3] - $ttf_im[7];
//$w = $ttf_im[7];
//$h = $ttf_im[8];
unset($ttf_im);
$txt_y =$this->img_height-$h;
$txt_x =$this->img_width-$w;
//$txt_y =0;
//$txt_x =0;
$this->img_new=@imagettftext($this->img_im,$txt_height,$txt_jiaodu,$txt_x,$txt_y,$color,$this->img_ttf,$this->img_text);
@unlink($this->image);//删除图片
switch($this->img_info[2]) {//取得背景图片的格式
case 1:imagegif($this->img_im,$this->image);break;
case 2:imagejpeg($this->img_im,$this->image);break;
case 3:imagepng($this->img_im,$this->image);break;
default: exit('水印图片失败');
}
}
//显示图片
function img_show(){echo '<img  src="'.$this- alt="php图片添加文字水印实现代码_PHP" >image.'" border="0" alt="'.$this->img_text.'" />';}
//释放内存
private function img_nothing(){
unset($this->img_info);
imagedestroy($this->img_im);
}
}
&#63;>
Copy after login

以上就是本文的全部内容,希望对大家的学习有所帮助。

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!