The 5th Annual China PHP Conference

imageopenpolygon

(PHP 7 >= 7.2.0)

imageopenpolygonDraws 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(400300);

// Allocate a color for the polygon
$col_poly imagecolorallocate($image255255255);

// Draw the polygon
imageopenpolygon($image, array(
        
0,   0,
        
100200,
        
300200
    
),
    
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

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top