PHP | Gmagick resizeimage() Function

Last Updated : 11 Jul, 2025

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(); 
?>