PHP/Graphics Image/imagefilledarc

Creating a Pie Graph Using imagefilledarc()

 
<?php
    define("WIDTH", 200);
    define("HEIGHT", 200);
    $piegraph_data = array (10, 5, 20, 40, 10, 15);
    $img = imagecreate(WIDTH, HEIGHT);
    $background = $white = imagecolorallocate($img, 0xFF, 0xFF, 0xFF);
    $black = imagecolorallocate($img, 0, 0, 0);
    $center_x = (int)WIDTH/2;
    $center_y = (int)HEIGHT/2;
    imagerectangle($img, 0, 0, WIDTH-1, HEIGHT-1, $black);
    $last_angle = 0;
    $percentage = 30;
    $arclen = (360 * $percentage) / 100;
    imagefilledarc($img,$center_x,$center_y,WIDTH-20,HEIGHT-20,$last_angle,($last_angle + $arclen),$black,IMG_ARC_EDGED | IMG_ARC_NOFILL);
    header("Content-Type: image/png");
    imagepng($img);
?>

Ellipses and circles

 
IMG_ARC_PIE draws a filled wedge shape with a curved edge
IMG_ARC_CHORD draws a straight line between the starting and ending angles
IMG_ARC_NOFILL draws the outside edge line without drawing the two lines toward the center of the arc
IMG_ARC_EDGED draws an unfilled wedge shape with a curved edge
<?
    imagefilledarc($image, 200, 150, 200, 200, 345, 15, $green,IMG_ARC_CHORD | IMG_ARC_NOFILL);
    imagefilledarc($image, 200, 150, 200, 200, 345, 15, $green,IMG_ARC_EDGED | IMG_ARC_NOFILL);
?>

Using imagefilledarc()

 
<?php
    define("WIDTH", 300);
    define("HEIGHT", 300);
    $img = imagecreate(WIDTH,HEIGHT);
    $bg = $white = imagecolorallocate($img, 0xFF, 0xFF, 0xFF);
    $black = imagecolorallocate($img, 0, 0, 0);
    $center_x = (int)WIDTH/2;
    $center_y = (int)HEIGHT/2;
    imagerectangle($img, 0, 0, WIDTH-1, HEIGHT-1, $black);
    imagefilledarc($img,
                   $center_x,
                   $center_y,
                   WIDTH/2,
                   HEIGHT/2,
                   0,
                   90,
                   $black,
                   IMG_ARC_PIE);
    header("Content-Type: image/png");
    imagepng($img);
?>