PHP | ImagickDraw getFillOpacity() Function

<?php

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Get the Fill Opacity
$fillOpacity = $draw->getFillOpacity();
echo $fillOpacity;
?>

<?php

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Set the Fill Opacity
$draw->setFillOpacity(0.6);

// Get the Fill Opacity
$fillOpacity = $draw->getFillOpacity();
echo $fillOpacity;
?>

<?php

// Create a new imagick object
$imagick = new Imagick();

// Create a image on imagick object
$imagick->newImage(800, 250, 'black');

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Set the fill color
$draw->setFillColor('yellow');

// Set the font size
$draw->setFontSize(20);

// Annotate a text
$draw->annotation(50, 100, 'The fill opacity here is ' 
                           . $draw->getFillOpacity());

// Set the fill opacity
$draw->setFillOpacity(0.4);

// Annotate a text
$draw->annotation(50, 200, 'The fill opacity here is ' 
                           . $draw->getFillOpacity());

// Render the draw commands
$imagick->drawImage($draw);

// Show the output
$imagick->setImageFormat('png');
header("Content-Type: image/png");
echo $imagick->getImageBlob();
?>