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>