PHP | Gmagick clear() Function

The Gmagick::clear() function is an inbuilt function in PHP which is used to clear all resources associated to Gmagick object.

Syntax:

Gmagick Gmagick::clear( void )

Parameters: This function does not accepts any parameter.

Return Value: This function returns the cleared Gmagick object.

Errors/Exceptions: This function throws GmagickException on error.

Below programs illustrate the Gmagick::clear() function in PHP:

Program 1:

<?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());
?>

Output:

1

Program 2:

<?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());
?>

Output:

1

Reference: http://php.net/manual/en/gmagick.clear.php