How to resize an image using PEAR in PHP

Question

Hi all,

Could anyone please provide me an example which is very easy to understand to resize an image using PEAR in PHP...

Thanks in advance...

Answer 1

Using Image_Transform package:

http://pear.php.net/manual/en/package.images.image-transform.general.php1

Answer 2

You can make use of imagecopyresampled function as:

Sample program (source: php.net)

<?php

// Image source.
$filename = 'http://valplibrary.files.wordpress.com/2009/01/5b585d_merry-christmas-blue-style.jpg';

$percent = 0.5; // percentage of resize

// send header with correct MIME.
header('Content-type: image/jpeg');

// Get image dimensions
list($width, $height) = getimagesize($filename);

// compute new dimensions.
$new_width = $width * $percent;
$new_height = $height * $percent;

// Resample
$image_p = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

// Output the resized image.
imagejpeg($image_p, null, 100);
?>

Answer 3

You are looking for the Image_Transform package from PEAR. The relevant manual page is at http://pear.php.net/manual/en/package.images.image-transform.scaling.php

Considering you are explicitly looking for a pear package to do this work, I presume you already know how to install image_transform. It is as easy as:

$ sudo pear install image_transform-0.9.3

One example of using the package:

<?php
require_once 'Image/Transform.php';

// factory pattern - returns an object
$a = Image_Transform::factory('GD');

// load the image file
$a->load("teste.jpg");

// scale image by percentage - 40% of its original size
$a->scalebyPercentage(40);

// displays the image
$a->display();
?>

and another example:

<?php
require_once 'Image/Transform.php';
$it = Image_Transform::factory("IM");
$it->load("image.png");
$it->resize(2,2);
$it->save("resized.png");
?>

Other examples, provided in the package can be found by doing: $ pear list image_transform