imagefilledpolygon() creates a filled polygon in image image. points is a PHP array containing the polygon's vertices, ie. points[0] = x0, points[1] = y0, points[2] = x1, points[3] = y1, etc. num_points is the total number of vertices.
<?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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