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edited Apr 24, 2018 at 14:20

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Alternatively, you could try the below code that was written by Amit Bera:

$image = new Varien_Image('/full/fs/path/to/image.jpg');

// you cannot use method chaining with Varien_Image
$image->constrainOnly(false);
$image->keepFrame(true);
// avoid black borders by setting background colour
$image->backgroundColor(array(255,255,255));
$image->keepAspectRatio(true);
$image->resize(216, 139);
$image->save('/full/fs/path/to/save/to.jpg');

Details of his answer can be seen here.

Alternatively, you could try the below code that was written by Amit Bera:

$image = new Varien_Image('/full/fs/path/to/image.jpg');

// you cannot use method chaining with Varien_Image
$image->constrainOnly(false);
$image->keepFrame(true);
// avoid black borders by setting background colour
$image->backgroundColor(array(255,255,255));
$image->keepAspectRatio(true);
$image->resize(216, 139);
$image->save('/full/fs/path/to/save/to.jpg');

Details of his answer can be seen here.

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created Apr 24, 2018 at 10:55

Liam McArthur

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4
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You would have to create a new function to support this. Magento can't natively resize any image, it just contains functions to resize particular images throughout the website such as image thumbnails. Something like this would work:

// Set image and folder URL
$folderURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);
$imageURL = $folderURL . $fileName;

// Set paths
$basePath = Mage::getBaseDir(Mage_Core_Model_Store::URL_TYPE_MEDIA) . DS . $fileName;
$newPath = Mage::getBaseDir(Mage_Core_Model_Store::URL_TYPE_MEDIA) . DS . "resized" . DS . $fileName;

// Create instance of Varien_Image
//$basePath - origin file location
$imageObj = new Varien_Image($basePath);
$imageObj->constrainOnly(TRUE);
$imageObj->keepAspectRatio(FALSE);
$imageObj->keepFrame(FALSE);
//$width, $height - sizes you need (Note: when keepAspectRatio(TRUE), height would be ignored)
$imageObj->resize($width, $height);
//$newPath - name of resized image
$imageObj->save($newPath);

// Create a URL of the image
$resizedURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA) . "resized" . DS . $fileName;

// Function to resize the image
public function resizeImg($fileName, $width, $height = '')
{
    $folderURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);
    $imageURL = $folderURL . $fileName;

    $basePath = Mage::getBaseDir(Mage_Core_Model_Store::URL_TYPE_MEDIA) . DS . $fileName;
    $newPath = Mage::getBaseDir(Mage_Core_Model_Store::URL_TYPE_MEDIA) . DS . "resized" . DS . $fileName;
    //if width empty then return original size image's URL
    if ($width != '') {
        //if image has already resized then just return URL
        if (file_exists($basePath) && is_file($basePath) && !file_exists($newPath)) {
            $imageObj = new Varien_Image($basePath);
            $imageObj->constrainOnly(TRUE);
            $imageObj->keepAspectRatio(FALSE);
            $imageObj->keepFrame(FALSE);
            $imageObj->resize($width, $height);
            $imageObj->save($newPath);
        }
        $resizedURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA) . "resized" . DS . $fileName;
     } else {
        $resizedURL = $imageURL;
     }
     return $resizedURL;
}

You could then call the new resizeImg function within your img src:

<img src="<?php echo resizeImg('https://url.com/image.jpg', '100', '100');?>" alt="" />

You can find full details of this function here.