PHP Reference

Description

int 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()


<?php



// create a 200*200 image

$img = imagecreate(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");

imagepng($img);

   

// free memory

imagedestroy($img);



?>