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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>