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imagesetpixel

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>