探讨PHP GD库实现中文水印的方法
当我们在网站中上传图片时,很多都有在图片上添加水印的需求。下面我们就为大家详细讲解
PHP GD库实现中文水印的相关代码示例:
- ?php
- $im = imagecreatetruecolor(100,100);
- //新建一个真彩色图像
- $white = imagecolorallocate($im,255,235,255);
- //为一幅图像分配颜色,这一点和我的设计常识有区别..
我从来没想过,在绘画时,要先给指定的图像标识分配颜色
..这个函数经常和imagefill函数搞混. - imagefill($im,0,0,$white);
- //区域填充
- $black = imagecolorallocate($im,250,50,50);
- //为一幅图像分配颜色
- imagerectangle($im,5,5,50,50,$black);
- //绘制一个矩形
- header("Content-type: image/jpeg");
- //发送标头,配合imagejpeg直接在浏览器中输出图像。
- imagejpeg($im,'ImageName',100);
- //输出一个像图,定名与质量
- imagedestroy($im);
- //释放与 image 关联的内存。image
是由图像创建函数返回的图像标识符 - ?>
PHP GD库实现中文水印代码
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>Header("Content-type: image/png"); </span></li> <li class="alt"><span>/*通知浏览器,要输出图像*/ </span></li> <li> <span>$</span><span class="attribute">im</span><span> = </span><span class="attribute-value">imagecreate</span><span>(400 , 300); </span> </li> <li class="alt"><span>/*定义图像的大小*/ </span></li> <li> <span>$</span><span class="attribute">gray</span><span> = </span><span class="attribute-value">ImageColorAllocate</span><span>($im , 235 , 235 , 235); </span> </li> <li class="alt"> <span>$</span><span class="attribute">pink</span><span> = </span><span class="attribute-value">ImageColorAllocate</span><span>($im, 255 , 128 , 255); </span> </li> <li><span>/* </span></li> <li class="alt"> <span>$</span><span class="attribute">fontfile</span><span> = </span><span class="attribute-value">"C:WINDOWSFontsSIMHEI.TTF"</span><span>; </span> </li> <li><span>不好意思,这句老是粘上后一提交就丢了,不知道是怎么回事<br>,想测试的朋友们将注释去了现测试吧 </span></li> <li class="alt"><span>*/ </span></li> <li><span>/* $fontfile 字体的路径,视操作系统而定,可以是 <br>simhei.ttf(黑体) , SIMKAI.TTF(楷体) , <br>SIMFANG.TTF(仿宋) ,SIMSUN.TTC(宋体&新宋体) <br>等 GD 支持的中文字体*/ </span></li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">iconv</span><span>('GB2312','UTF-8','中文水印!!!'); </span> </li> <li><span>/*将 gb2312 的字符集转换成 UTF-8 的字符*/ </span></li> <li class="alt"><span>ImageTTFText($im, 30, 0, 50, 140, <br>$pink , $fontfile , $str); </span></li> <li><span>/* 加入中文水印 */ </span></li> <li class="alt"><span>Imagepng($im); </span></li> <li><span>ImageDestroy($im); </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> </ol>
以上就是PHP GD库实现中文水印的相关方法总结。

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