PHP | Gmagick resizeimage() Function

The Gmagick::resizeimage() function is an inbuilt function in PHP which is used to scale an image in given dimensions with a filter.
Syntax:

Gmagick Gmagick::resizeimage( $width, $height, $filter, $blur)

Parameters: This function accepts four parameters as mentioned above and described below: 

• $width: This parameter is used to set the width of image.
• $height: This parameter is used to set the height of image.
• $filter: This parameter is used to set the value for filter.
• $blur: This parameter is used to set the value for blur. The value larger than 1 results in blurry whereas lesser than 1 is sharp. 
  

Return Value: This function returns Gmagick object on success.
Errors/Exceptions: This function throws GmagickException on error.
Below programs illustrates the Gmagick::resizeimage() function in PHP:
Program 1:
Input Image:

php

<?php

// Create a Gmagick object
$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png');

// Resize the image.
$gmagick->resizeimage(1024, 768, 10, 5, true);

header('Content-type: image/png');

// Output the image
echo $gmagick;
?>

Output:

Program 2:

php

<?php

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

// Create GmagickPixel object
$strokeColor = new GmagickPixel('Red');
$fillColor = new GmagickPixel('Green');

// Set the color, opacity of image
$draw->setStrokeOpacity(1);
$draw->setStrokeColor('Red');
$draw->setFillColor('Green');

// 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);

// Resize the image
$gmagick->resizeimage(890, 790, 6, 10);

// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

Output:

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