PHP | Gmagick clear() Function

<?php 
   
// Create a GmagickDraw object 
$draw = new GmagickDraw(); 
  
// Create GmagickPixel object 
$fillColor = new GmagickPixel('Green'); 
  
// Set stroke opacity
$draw->setfillcolor('red');

// Set the width and height of image 
$draw->setStrokeWidth(7); 
$draw->setFontSize(72); 
   
// Function to draw circle  
$draw->circle(250, 250, 100, 150); 
 
$gmagick = new Gmagick(); 
$gmagick->newImage(500, 500, 'White'); 
$gmagick->setImageFormat("png"); 
$gmagick->drawImage($draw); 

// Using clear() function
print_r($gmagick->clear());
?> 

<?php 
    
// Create a GmagickDraw object 
$draw = new ImagickDraw();  
   
// Set the color
$draw->setFillColor('Green'); 
   
// Set the width and height of image 
$draw->setStrokeWidth(17); 
 
// Function to draw line
for($x = 0; $x < 40; $x++) {
    $draw->line(rand(0, 100), rand(0, 60), rand(0, 500), rand(0, 500));
    $draw->line(rand(0, 100), rand(0, 60), rand(0, 500), rand(0, 500));
    $draw->line(rand(0, 100), rand(0, 60), rand(0, 500), rand(0, 500));
    $draw->line(rand(0, 100), rand(0, 60), rand(0, 500), rand(0, 500));
}

$gmagick = new Imagick(); 
$gmagick->newImage(500, 500, 'White'); 
$gmagick->setImageFormat("png"); 
 
// Set the color
$draw->setFillColor('Black'); 
 
// Set Font Size
$draw->setFontSize(20); 
 
// Use of drawimage function
$gmagick->drawImage($draw); 

$gmagick->annotateImage($draw, 5, 220, 0, 
     'Stroke Width using getstrokewidth() function :'
                        . $draw->getstrokewidth());
 
// Using clear() function
print_r($gmagick->clear());
?>