PHP imagefilledarc Function: Drawing and Filling Elliptical Arcs

imagefilledarc is a PHP GD library function that draws a filled elliptical arc on a given image resource.

Parameters resource $image – image resource created by functions such as imagecreatetruecolor(). int $cx – x-coordinate of the center. int $cy – y-coordinate of the center. int $width – width of the ellipse. int $height – height of the ellipse. int $start – start angle in degrees. int $end – end angle; 0° is at three‑o’clock and the arc is drawn clockwise. int $color – color identifier allocated with imagecolorallocate(). int $style – bitwise OR of IMG_ARC_PIE, IMG_ARC_CHORD, IMG_ARC_NOFILL, IMG_ARC_EDGED.

Return value

Returns the image resource on success, or FALSE on failure.

Example

<?php
// Create image
$image = imagecreatetruecolor(100, 100);
// Allocate colors
$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);
$darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90);
$navy = imagecolorallocate($image, 0x00, 0x00, 0x80);
$darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50);
$red = imagecolorallocate($image, 0xFF, 0x00, 0x00);
$darkred = imagecolorallocate($image, 0x90, 0x00, 0x00);
// 3D effect
for ($i = 60; $i > 50; $i--) {
    imagefilledarc($image, 50, $i, 100, 50, 0, 45, $darknavy, IMG_ARC_PIE);
    imagefilledarc($image, 50, $i, 100, 50, 0, 45, $darkgray, IMG_ARC_PIE);
    imagefilledarc($image, 50, $i, 100, 50, 0, 45, 360, $darkred, IMG_ARC_PIE);
}
imagefilledarc($image, 50, 50, 100, 50, 0, 45, $navy, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 0, 45, $gray, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 0, 45, $red, IMG_ARC_PIE);
// Output image
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>

The script outputs a PNG image showing several filled arcs that create a simple 3‑D effect.