PHP制作3D扇形统计图以及对图片进行缩放操作实例_PHP

1、利用php gd库的函数绘制3D扇形统计图

<&#63;php<br />header("content-type","text/html;charset=utf-8");<br />/*扇形统计图*/<br />$image = imagecreatetruecolor(100, 100);    /*创建画布*/<br />/*设置画布需要的颜色*/<br />$white = imagecolorallocate($image,0xff,0xff,0xff);<br />$gray = imagecolorallocate($image, 0xc0, 0xc0, 0xc0);<br />$darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90);<br />$navy = imagecolorallocate($image, 0x00, 0x00, 0x80);<br />$darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50);<br />$red = imagecolorallocate($image, 0xff, 0x00, 0x00);<br />$darkred = imagecolorallocate($image, 0x90, 0x00, 0x00);<br />/*填充背景色*/<br />imagefill($image, 0, 0, $white);<br />/*3D制作*/<br />for($i = 60; $i > 50; $i--)<br>{<br>imagefilledarc($image, 50, $i, 100, 50, -160, 40, $darknavy, IMG_ARC_PIE);<br>imagefilledarc($image, 50, $i, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE);<br>imagefilledarc($image, 50, $i, 100, 50, 75, 200, $darkred, IMG_ARC_PIE);<br>}<br>/*画椭圆弧并填充*/<br>imagefilledarc($image, 50, 50, 100, 50, -160, 40, $darknavy, IMG_ARC_PIE);<br>imagefilledarc($image, 50, 50, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE);<br>imagefilledarc($image, 50, 50, 100, 50, 75, 200, $darkred, IMG_ARC_PIE);<br>/*画字符串*/<br>imagestring($image, 3, 15, 55, "30%", $white);<br>imagestring($image, 3, 45, 35, "60%", $white);<br>imagestring($image, 3, 60, 60, "10%", $white);<br>/*输出图像*/<br>header("content-type:image/png");<br>imagepng($image);<br>/*释放资源*/<br>imagedestroy($image);<br>?>

效果：

2、对图片进行缩放

<div><br><h4>原图大小</h4><br><img src="1.png"><br></div><br><&#63;php<br />header("content-type","text/html;charset=utf-8");<br />/*<br />*图片缩放<br />*@param string $filename   图片的url<br />*@param int    $width      设置图片缩放的最大宽度<br />*@param int    $height     设置图片缩放的最大高度<br />*/<br />function thumb($filename,$width=130,$height=130)<br />{<br />/*获取原图的大小*/<br />list($width_orig,$height_orig) = getimagesize($filename);<br />/*根据参数$width和$height，换算出等比例的高度和宽度*/<br />if($width && ($width_orig < $height_orig))<br />{<br />$width = ($height / $height_orig) * $width_orig;<br />}<br />else<br />{<br />$height = ($width / $width_orig) * $height_orig;<br />}<br />/*以新的大小创建画布*/<br />$image_p = imagecreatetruecolor($width, $height);<br />/*获取图像资源*/<br />$image = imagecreatefrompng($filename);<br />/*使用imagecopyresampled缩放*/<br />imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);<br />/*保存缩放后的图片和命名*/<br />imagepng($image_p,'test.png');<br />/*释放资源*/<br />imagedestroy($image_p);<br />imagedestroy($image);<br />}<br />/*调用函数*/<br />thumb('1.png');<br />&#63;><br><div><br><h4>缩放后的大小</h4><br><img src="test.png"><br></div>

效果：