php-gdHow to draw circle

Check antialiasing strategies to get smooth drawing.

<?php

$im = imagecreatetruecolor(400, 300);

$c_black = imageColorAllocate($im, 0,0,0);
$c_green = imageColorAllocate($im, 46,204,64);

imageellipse($im, 200, 150, 100, 100, $c_green);

imagePng($im, '/tmp/image.png');ctrl + cgithub

`imagecreatetruecolor` creates true color GD image object with specified width & height	`imageColorAllocate` creates color object to later use in image
`imageellipse` creates ellipse with specified coordinates, radius and border color	`200, 150` coordinates of center of circle
`100, 100` horizontal and vertical radius should be equal to get circle	`$c_green` fill color
`imagePng` saves image in PNG format to the given path

Usage example

<?php

$im = imagecreatetruecolor(400, 300);

$c_black = imageColorAllocate($im, 0,0,0);
$c_green = imageColorAllocate($im, 46,204,64);

imageellipse($im, 200, 150, 100, 100, $c_green);

imagePng($im, '/tmp/image.png');

How to draw filled circle

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php-gdHow to draw circle

Usage example

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