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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>