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>