PHP | imagefilltoborder() Function

<?php

// Load the png image
$im = imagecreatefrompng(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png');

// Create colors
$borderColor = imagecolorallocate($im, 0, 200, 0);
$fillColor = imagecolorallocate($im, 0, 0, 200);

// Add fill to border
imagefilltoborder($im, 0, 0, $borderColor, $fillColor);

// Show the output
header('Content-type: image/png');
imagepng($im);
?>

<?php

// Create the image handle, set the background to white
$im = imagecreatetruecolor(800, 250);
imagefilledrectangle($im, 0, 0, 800,
        250, imagecolorallocate($im, 0, 255, 0));

// Draw an ellipse to fill with a black border
imageellipse($im, 250, 150, 250, 150,
        imagecolorallocate($im, 0, 0, 0));

// Fill the selection
imagefilltoborder($im, 50, 50, imagecolorallocate($im,
        0, 0, 0), imagecolorallocate($im, 255, 0, 0));

// Output the image
header('Content-type: image/png');
imagepng($im);
?>