How to programmatically find out what Magento 2 version in installed

dmitrii_fediuk · January 24, 2016, 10:26am

There is a legacy (not recommended) solution with \Magento\Framework\AppInterface::VERSION constant:

It works in 2.0.0 and 2.0.1 by is already removed from the latest development version, so you should not rely on it.

The new solution is to use the \Magento\Framework\App\ProductMetadataInterface::getVersion()

github.com

magento/magento2/blob/43e3fd79/lib/internal/Magento/Framework/App/ProductMetadataInterface.php#L12-L17


/**
 * Get Product version
 *
 * @return string
 */
public function getVersion();

By default it is implemented by the \Magento\Framework\App\ProductMetadata::getVersion()

github.com

magento/magento2/blob/43e3fd79/lib/internal/Magento/Framework/App/ProductMetadata.php#L41-L60


public function getVersion()
{
    if (!$this->version) {
        $composerJsonFile = $this->composerJsonFinder->findComposerJson();


        $composerContent = file_get_contents($composerJsonFile);
        if ($composerContent === false) {
            throw new \Exception('Composer file content is empty');
        }
        $composerContent = json_decode($composerContent, true);
        if (!$composerContent
            || !is_array($composerContent)
            || !array_key_exists('version', $composerContent)
        ) {
            throw new \Exception('Unable to decode Composer file');
        }
        $this->version = $composerContent['version'];
    }
    return $this->version;
}

Actually, lt looks at the root composer.json file:

github.com

magento/magento2/blob/2.0.1/composer.json#L5


{
"name": "magento/magento2ce",
"description": "Magento 2 (Community Edition)",
"type": "project",
"version": "2.0.1",
"license": [
    "OSL-3.0",
    "AFL-3.0"
],
"repositories": [
    {
        "type": "composer",
        "url": "https://repo.magento.com/"
    }
],

A usage example

github.com

magento/magento2/blob/43e3fd79/app/code/Magento/Backend/Block/Page/Footer.php#L47-L55


/**
 * Get product version
 *
 * @return string
 */
public function getMagentoVersion()
{
    return $this->productMetadata->getVersion();
}

dmitrii_fediuk · January 24, 2016, 10:30am

mage2pro/core/blob/3.6.25/Core/lib/state.php#L64-L75


/**
* 2016-06-25 https://mage2.pro/t/543
* 2018-04-17
* 1) «Magento 2.3 has removed its version information from the `composer.json` files since 2018-04-05»:
* https://mage2.pro/t/5480
* 2) Now Magento 2.3 (installed with Git) returns the «dev-2.3-develop» string from the
* @see \Magento\Framework\App\ProductMetadata::getVersion() method.
* @used-by df_sentry()
*/
function df_magento_version() {return dfcf(function() {return df_trim_text_left(
	df_magento_version_m()->getVersion()
, 'dev-');});}