php画一个背景透明,且开始处旋转到在圆的正下方处的一个圆饼统计图
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2022-04-26 11:53:08
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/* * _survey 得到一个投票的圆饼图 * @access public 表示函数对外公开 * @param $_agree 同意票数 * @param $_disagree 反对票数 * return 一张统计圆饼图 * */ function _vote($_agree,$_disagree){ //处理参数 if($_agree==0&&$_disagree==0){ $_vote = 270; } if($_agree==0&&$_disagree!=0){ $_vote = 91; } if($_agree!=0&&$_disagree==0){ $_vote = 89; } if($_agree!=0&&$_disagree!=0){ $_vote = intval(360*($_agree/($_agree+$_disagree))+90); } //创建画布 $_img=imagecreatetruecolor(150,100); //填充透明背景 imagealphablending($_img, false); imagesavealpha($_img, true); $white = imagecolorallocatealpha($_img,255,255,255,127); imagefill($_img,0,0,$white); //创建颜色 $_green=imagecolorallocate($_img,180,210,52); $_blue=imagecolorallocate($_img,83,201,237); $_gary=imagecolorallocate($_img,192,192,192); $_green1=imagecolorallocate($_img,149,178,36); $_blue1=imagecolorallocate($_img,41,160,193); $_gary1=imagecolorallocate($_img,144,144,144); for($i=60;$i>=50;$i--){ imagefilledarc($_img,100,$i,100,50,90,$_vote,$_blue1,IMG_ARC_PIE); imagefilledarc($_img,100,$i,100,50,$_vote,90,$_green1,IMG_ARC_PIE); } imagefilledarc($_img,100,$i,100,50,90,$_vote,$_blue,IMG_ARC_PIE); imagefilledarc($_img,100,$i,100,50,$_vote,90,$_green,IMG_ARC_PIE); header("content-type: image/png"); imagepng($_img); imagedestroy($_img); }