imageellipse(): ellipse using PHP GD

<?Php
header ("Content-type: image/jpeg");
$width=301;$height=301;
$im = @ImageCreate ($width, $height) 
 or die ("Cannot Initialize new GD image stream");
 
ImageColorAllocate($im,255,255,255); // background colour
$text_color=ImageColorAllocate($im,255,0,0);// ellipse line colour   
imageellipse($im,150,150,290,150,$text_color); // draw ellipse

Imagejpeg ($im); // show image 
imagedestroy($im); //memory is cleared.
?>

imageellipse($image,$center_x,$center_y,$width,$height,$color)

Creating full circle using imageellipse()

Example

<?Php
header ("Content-type: image/jpeg");
$width=301;$height=301;
$im = @ImageCreate ($width, $height) 
 or die ("Cannot Initialize new GD image stream");
ImageColorAllocate($im,255,255,255);
$text_color=ImageColorAllocate($im,255,0,0);   
imageellipse($im,150,150,290,290,$text_color); // outer face
imageellipse($im,80,100,50,50,$text_color); // left eye 
imageellipse($im,220,100,50,50,$text_color); // right eye
imageellipse($im,150,200,70,10,$text_color); // mouth
Imagejpeg ($im);
imagedestroy($im); //memory is cleared.
?>

Concentric circle using imageellipse()

<?Php
header ("Content-type: image/jpeg");
$width=601;$height=601;$gap=20;
$im = @ImageCreate ($width, $height) 
 or die ("Cannot Initialize new GD image stream");
ImageColorAllocate($im,255,255,255);
$text_color=ImageColorAllocate($im,0,255,255);   
for($i=0;$i<=$width;$i +=$gap){
imageellipse($im,$width/2,$height/2,$width-$i,$height-$i,$text_color);
}
Imagejpeg ($im);
 imagedestroy($im); //memory is cleared.
?>

<?Php
header ("Content-type: image/jpeg");
$width=601;$height=601;$gap=20;
$im = @ImageCreate ($width, $height) 
 or die ("Cannot Initialize new GD image stream");
ImageColorAllocate($im,255,255,255);
$text_color=ImageColorAllocate($im,0,255,255);   
for($i=0;$i<=$width;$i +=$gap){
    $r=rand(1,255);
    $g=rand(1,255);
    $b=rand(1,255);	
    $text_color = ImageColorAllocate ($im, $r, $g,$b);    
imageellipse($im,$width/2,$height/2,$width-$i,$height-$i,$text_color);
}
Imagejpeg ($im);
imagedestroy($im); //memory is cleared.
?>