(PHP 4, PHP 5, PHP 7)
imagesetpixel — Set a single pixel
imagesetpixel ( resource $image , int $x , int $y , int $color ) : bool
imagesetpixel() draws a pixel at the specified coordinate.
image
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
x
x-coordinate.
y
y-coordinate.
color
A color identifier created with imagecolorallocate().
Returns true
on success or false
on failure.
Example #1 imagesetpixel() example
A random drawing that ends with a regular picture.
<?php $x = 200; $y = 200; $gd = imagecreatetruecolor($x, $y); $corners[0] = array('x' => 100, 'y' => 10); $corners[1] = array('x' => 0, 'y' => 190); $corners[2] = array('x' => 200, 'y' => 190); $red = imagecolorallocate($gd, 255, 0, 0); for ($i = 0; $i < 100000; $i++) { imagesetpixel($gd, round($x),round($y), $red); $a = rand(0, 2); $x = ($x + $corners[$a]['x']) / 2; $y = ($y + $corners[$a]['y']) / 2; } header('Content-Type: image/png'); imagepng($gd); ?>
The above example will output something similar to:
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.imagesetpixel.php