PHP imagearc() function drawing elliptical arc usage and example

PHP Image Processing

imagearc — used to draw an elliptical arc.

syntax

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

imagearc() draws an elliptical arc in the image represented by image, with cx, cy (the top left corner of the image is 0, 0) as the center.

w and h specify the width and height of the ellipse, the starting and ending points are specified by the s and e parameters in degrees. 0° is located at the 3 o'clock position, and is drawn in a clockwise direction.

example

<?php
$img = imagecreatetruecolor(200,　200);//　create a　200*200 image
$white = imagecolorallocate($img,　　　255,　　　255,　255);　//　color
//　draw an elliptical arc
imagearc($img,　140,　　75,　　50,　　50, 0,　360, $white);
//　browser output image
header("Content-type: image/png");
imagepng($img);
imagedestroy($img);
?>

PHP Image Processing