imagesetpixel

Description
Syntax
Examples
Links

Description

The imagesetpixel of Image for PHP set a single pixel.

Syntax

imagesetpixel(
    GdImage $image,
    int $x,
    int $y,
    int $color
): bool

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().

x

x-coordinate.

y

y-coordinate.

color

A color identifier created with imagecolorallocate().

Return

Returns true on success or false on failure.

Examples

1 · return

<?

$width = 100;
$height = 100;
$image = imagecreate($width, $height);

$red = 255;
$green = 255;
$blue = 255;
$color = imagecolorallocate($image, $red, $green, $blue);

$x = 0;
$y = 0;

$return = imagesetpixel($image, $x, $y, $color);

var_export($return);

true

2 · base64

<?

$width = 100;
$height = 100;
$image = imagecreatetruecolor($width, $height);

$red = 255;
$green = 255;
$blue = 255;
$color = imagecolorallocate($image, $red, $green, $blue);

$x = 50;
$y = 50;
imagesetpixel($image, $x, $y, $color);

ob_start();

    imagepng($image);

$output = ob_get_clean();

echo '<!doctype html>
<html>
<body>
    <img src="data:image/png;base64,' . base64_encode($output) . '">
</body>
</html>';

<!doctype html>
<html>
<body>
    <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAO0lEQVR4nO3OMQEAAAgDoPUvPUN4eAgJSAAAAAAAAAAAAAAAAAAA4JG21wUAAAAAAAAAAAAAAAAAAHYGZzAC/so5nyEAAAAASUVORK5CYII=">
</body>
</html>

3 · base64 · random

<?

$width = 100;
$height = 100;
$image = imagecreatetruecolor($width, $height);

$red = 255;
$green = 255;
$blue = 255;
$color = imagecolorallocate($image, $red, $green, $blue);

for($i = 0; $i < 1000; ++$i)
{
    $x = rand(0, $width);
    $y = rand(0, $height);
    imagesetpixel($image, $x, $y, $color);
}

ob_start();

    imagepng($image);

$output = ob_get_clean();

echo '<!doctype html>
<html>
<body>
    <img src="data:image/png;base64,' . base64_encode($output) . '">
</body>
</html>';

<!doctype html>
<html>
<body>
    <img src="data:image/png;base64,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">
</body>
</html>