GD and Image Functions
PHP Manual

imageopenpolygon

Draws an open polygon

Description

bool imageopenpolygon ( resource $image , array $points , int $num_points , int $color )

imageopenpolygon draws an open polygon on the given image. Contrary to imagepolygon, no line is drawn between the last and the first point.

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor.

points

An array containing the polygon's vertices, e.g.:

points[0] = x0
points[1] = y0
points[2] = x1
points[3] = y1

num_points

Total number of points (vertices).

color

A color identifier created with imagecolorallocate.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 imageopenpolygon example

<?php
// Create a blank image
$image = imagecreatetruecolor(400, 300);

// Allocate a color for the polygon
$col_poly = imagecolorallocate($image, 255, 255, 255);

// Draw the polygon
imageopenpolygon($image, array(
        0,   0,
        100, 200,
        300, 200
    ),
    3,
    $col_poly);

// Output the picture to the browser
header('Content-type: image/png');

imagepng($image);
imagedestroy($image);
?>

The above example will output something similar to:

Output of example : imageopenpolygon()

See Also

  • imagepolygon