PHP生成横状百分比图片实例
Jun 21, 2016 am 08:50 AM
给用户看数据的时候,直观效果上:文字不如数字,数字不如图片.在调查表的设计上采用横柱百分比图片形式展示给用户,用户很直观的看出哪个调查或某个结果的热门程度。下面是分享如何实现技术:
1.PHP本身就支持了画图,但必须开启GD库。
打php.ini 文件,找到extension=php_gd2.dll,把前面的分号“;”去掉,重启apache
2.下面是一个demo文件,解释说的比较详细了,再不懂只能百度了^_^
XML/HTML Code
- //创建画布,在创建前不要有任何输出和空格哦,否则图片生成不了
-
$im=imagecreatetruecolor(100,10);
- //$cc=imagecolorallocate($im,245,245,245);
- //imagefill($im,0,0,$cc);
- //着色的颜色,采用的是RGB的格式
- $red=imagecolorallocate($im,0,0,245);
- $cc=imagecolorallocate($im,245,245,245);
- //颜色
- $red1 = imagecolorallocate($im,30,144,255);
- $red2 = imagecolorallocate($im,220,20,60);
- $red3 = imagecolorallocate($im,0,206,209);
- $red4 = imagecolorallocate($im,255,255,0);
- //填充矩形颜色可以自定义填充的颜色,上面定义的颜色在这里我只是做测试例子,至于长度比例大小可以根据项目动态数据来控制
- //圆
- //imageellipse($im,20,20,20,20,$red);
- //直线
- //imageline($im,0,0,400,300,$red);
- //矩形
- //imagerectangle($im,0,0,100,10,$red);
- //填充矩形
- imagefilledrectangle($im,0,0,30,10,$red);
- imagefilledrectangle($im,30,0,100,10,$cc);
- //弧线
- //imagearc($im,100,100,50,50,180,270,$red);
- //扇形
- //imagefilledarc($im,100,100,80,50,180,270,$red,IMG_ARC_PIE);
- //拷贝图片到画布
- //1.加载源图片
- //$srcImage=imagecreatefromgif("2.GIF");
- //这里我们可以使用一个getimagesize()
- //$srcImageInfo=getimagesize("2.GIF");
- //拷贝源图片到目标画布
- //imagecopy($im,$srcImage,0,0,0,0,$srcImageInfo[0],$srcImageInfo[1]);
- header("content-type: image/png");
- //生成图片
- imagepng($im);
- //释放内存,亲,注意咯!如果不加这句,访问量大的话apache会爆掉的哦
- imagedestory($im);
- ?>

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