(PHP 4 >= 4.0.6, PHP 5, PHP 7)
imagefilledarc — Draw a partial arc and fill it
$image
   , int $cx
   , int $cy
   , int $width
   , int $height
   , int $start
   , int $end
   , int $color
   , int $style
   )
   Draws a partial arc centered at the specified coordinate in the
   given image.
  
imageAn image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
cxx-coordinate of the center.
cyy-coordinate of the center.
widthThe arc width.
heightThe arc height.
startThe arc start angle, in degrees.
endThe arc end angle, in degrees. 0° is located at the three-o'clock position, and the arc is drawn clockwise.
colorA color identifier created with imagecolorallocate().
styleA bitwise OR of the following possibilities:
IMG_ARC_PIEIMG_ARC_CHORDIMG_ARC_NOFILLIMG_ARC_EDGEDIMG_ARC_PIE and IMG_ARC_CHORD are
       mutually exclusive; IMG_ARC_CHORD just
       connects the starting and ending angles with a straight line, while
       IMG_ARC_PIE produces a rounded edge.
       IMG_ARC_NOFILL indicates that the arc
       or chord should be outlined, not filled.  IMG_ARC_EDGED,
       used together with IMG_ARC_NOFILL, indicates that the
       beginning and ending angles should be connected to the center - this is a
       good way to outline (rather than fill) a 'pie slice'.
      
     
   Returns TRUE on success or FALSE on failure.
  
Example #1 Creating a 3D looking pie
<?php
// create image
$image = imagecreatetruecolor(100, 100);
// allocate some 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);
// make the 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, 45, 75 , $darkgray, IMG_ARC_PIE);
   imagefilledarc($image, 50, $i, 100, 50, 75, 360 , $darkred, IMG_ARC_PIE);
}
imagefilledarc($image, 50, 50, 100, 50, 0, 45, $navy, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 45, 75 , $gray, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 75, 360 , $red, IMG_ARC_PIE);
// flush image
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>
The above example will output something similar to:
 
     Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).