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Last updated: Tue, 19 Sep 2006


(PHP 3, PHP 4, PHP 5)

imagearc -- Draw a partial ellipse


bool imagearc ( resource image, int cx, int cy, int w, int h, int s, int e, int color )

imagearc() draws a partial ellipse centered at cx, cy (top left is 0, 0) in the image represented by image. W and h specifies the ellipse's width and height respectively while the start and end points are specified in degrees indicated by the s and e arguments. 0° is located at the three-o'clock position, and the arc is drawn clockwise.

Example 1. Drawing a circle with imagearc()


// create a 200*200 image
$img = imagecreatetruecolor(200, 200);

// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$black = imagecolorallocate($img, 0, 0, 0);
// draw a black circle 
imagearc($img, 100, 100, 150, 150, 0, 360, $black);

// output image in the browser
header("Content-type: image/png");
// free memory


See also imageellipse(), imagefilledellipse(), and imagefilledarc().

Last updated: Tue, 19 Sep 2006