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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>