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imagefilledpolygon (PHP 3, PHP 4 ) imagefilledpolygon -- 画一多边形并填充 说明int imagefilledpolygon ( resource image, array points, int num_points, int color)
imagefilledpolygon() 在 image
图像中画一个填充了的多边形。points
是一个 PHP 的数组，包含了多边形的各个顶点坐标，即 points[0]
= x0，points[1] = y0，points[2]
= x1，points[3] = y1，以此类推。num_points 是顶点的总数。
例子 1. imagefilledpolygon() 例子
<?php
// this example is provided by ecofarm at mullum dot com dot au
// set up array of points for polygon
$values = array(
0 => 40, // x1
1 => 50, // y1
2 => 20, // x2
3 => 240, // y2
4 => 60, // x3
5 => 60, // y3
6 => 240, // x4
7 => 20, // y4
8 => 50, // x5
9 => 40, // y5
10 => 10, // x6
11 => 10, // y6
);
// create image
$im = imagecreate(250, 250);
// some colors
$bg = imagecolorallocate($im, 255, 255, 255);
$blue = imagecolorallocate($im, 0, 0, 255);
// draw a polygon
imagefilledpolygon($im, $values, 6, $blue );
// flush image
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>
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