imageellipse() Drawing of arc line images and circles using gd support in PHP

Draw an ellipse or circle outline

imageellipse() uses the center point plus width and height. Use equal dimensions for a circle.

<?php
$image = imagecreatetruecolor(320, 220);
$background = imagecolorallocate($image, 255, 255, 255);
$green = imagecolorallocate($image, 20, 150, 90);
imagefilledrectangle($image, 0, 0, 319, 219, $background);
imageellipse($image, 160, 110, 220, 120, $green);

header('Content-Type: image/png');
imagepng($image);
imagedestroy($image);
?>

Current example first; the original tutorial examples below are retained and cleaned up for continued learning.

<?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.
?>

Output

Syntax

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

`$image`	Image created using ImageCreate() or imagecreatetruecolor()
`$center_x`	x coordinate of center ( X : Horizontal )
`$center_y`	y coordinate of center ( Y : Vertical )
`$width`	Width of the ellipse
`$height`	Height of the ellipse
`$color`	Color of the border by using imagecolorallocate().

Creating full circle using imageellipse()

We need to maintain $width and $height equal to create a circle.

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()

Common center for all the circles.
Circles 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.
?>

Change the colours of the circle by using random numbers between 1 and 255 ( R G B )
Color Circles 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){
    $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.
?>

GD functions imagefilledellipse() imagearc() imagerectangle()
GD imagefilledarc() : Draw filled arcs to create PIE chat

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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Draw Ellipses and Circles with imageellipse()

Draw an ellipse or circle outline

Creating full circle using imageellipse()

Example

Concentric circle using imageellipse()

Subhendu Mohapatra