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How to resize any images in Magento

How to Resize Any Images in Magento
Nick Kravchuk Avatar
Nick Kravchuk

In this article, I’ll describe how to resize images, such as needing to resize a custom image and display it on the site in special sized areas.
Let’s do it.Say we have an image located in the media folder /media/example.jpg
First, we need to initialize the $folderURL variable:

$folderURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);

Then, the image URL:

$imageURL = $folderURL . $fileName;

Note: The format for $fileName = can be: ‘example.jpg’; or ‘testfolder/example.jpg’;
Next, we need to specify the full path for the existing file name ($basePath) and the name of the file that needs to be resized ($newPath). In this case they are:

$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;

After this, we need to create an instance of Varien_Image class

//$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);

Then, we need to get the URL of the resized image:

$resizedURL = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA) . "resized" . DS . $fileName;

Lastly, let’s make the function resizeImg($fileName, $width, $height = ”)

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;
}

That’s it! I hope this article helps you. Until next time, Happy Coding!

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