PHP制作3D扇形统计图以及对图片进行缩放操作实例，

PHP制作3D扇形统计图以及对图片进行缩放操作实例，

1、利用php gd库的函数绘制3D扇形统计图

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" alt="PHP制作3D扇形统计图以及对图片进行缩放操作实例，" ><br>
</div><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 && ($width_orig {<br>$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>?><br><div>
<br><h4>缩放后的大小</h4>
<br><img  src="test.png" alt="PHP制作3D扇形统计图以及对图片进行缩放操作实例，" ><br>
</div>

效果：