PHP | Imagick clear() Function

The Imagick::clear() function is an inbuilt function in PHP which is used to clear all resource allocated to an Imagick object.

Syntax:

bool Imagick::clear( void )

Parameters: This function does not accept any parameter. It just clears off the resources of the Imagick object which is used to call the function.

Return Value: This function returns true if the resources are cleared, else it returns false.

Program 1: This program display the image content without using Imagick::clear() function.

<?php

// Store the image into variable
$url =
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png';

// The file_get_contents() function
// reads the image as string
$image = file_get_contents($url);

// Create an Imagick object
$imagick = new Imagick();
$imagick->readImageBlob($image);

// Comment the clear() function which
// will display the image on the web page
//$imagick->clear();

header("Content-Type: image/jpg");

// Display the output image
echo $imagick->getImageBlob();

?>

Output:

Program 2: This program uses Imagick::clear() function to clear all resources associated to imagick object.

<?php

// Store the image into variable
$url =
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png';

// The file_get_contents() function
// reads the image as string
$image = file_get_contents($url);

// Create an Imagick object
$imagick = new Imagick();
$imagick->readImageBlob($image);

// Comment the clear() function which
// will display the image on the web page
$imagick->clear();

header("Content-Type: image/jpg");

// Display the output image
echo $imagick->getImageBlob();

?>

Output:

Reference: https://www.php.net/manual/en/imagick.clear.php