How to Manually Upgrade phpMyAdmin

Since the release of Ubuntu 18.04 and some other Linux distros, many people have been having compatibility issues with PHP 7.2 and phpMyAdmin 4.6. In this article we will manually download and install the latest version of phpMyAdmin to resolve these issues.

It’s possible that when you installed phpMyAdmin, your repository was still serving phpMyAdmin v4.6.6 and not the latest version (v4.8.3 as of writing), which is causing compatibility issues with PHP 7.2.

Firstly, visit the phpMyAdmin download page and look for the latest version. As of writing, the latest is phpMyAdmin 4.8.3, which we will install in this guide.

1. Backup phpMyAdmin

You should backup your current phpMyAdmin folder by renaming it.

sudo mv /usr/share/phpmyadmin/ /usr/share/phpmyadmin.bak

Create a new phpMyAdmin folder

sudo mkdir /usr/share/phpmyadmin/

Change to directory

cd /usr/share/phpmyadmin/

2. Download and Extract phpMyAdmin

Visit the phpMyAdmin download page and look for the .tar.gz URL and download it using wget. In this guide, we are using version 4.8.3. If you are using a later version, make sure to change the commands below to match.

sudo wget https://files.phpmyadmin.net/phpMyAdmin/4.8.3/phpMyAdmin-4.8.3-all-languages.tar.gz

Now extract

sudo tar xzf phpMyAdmin-4.8.3-all-languages.tar.gz

Once extracted, list folder

ls

You should see a new folder phpMyAdmin-4.8.3-all-languages.We want to move the contents of this folder to /usr/share/phpmyadmin

sudo mv phpMyAdmin-4.8.3-all-languages/* /usr/share/phpmyadmin

You can now log back into phpMyAdmin and check the current version. You may also see two errors:

3. Edit vendor_config.php

If you are seeing an error The $cfg[‘TempDir’] (./tmp/) is not accessible. phpMyAdmin is not able to cache templates and will be slow because of this.

Open vendor_config.php

sudo nano /usr/share/phpmyadmin/libraries/vendor_config.php

Press CTRL + W and search for TEMP_DIR

Change line to

define('TEMP_DIR', '/var/lib/phpmyadmin/tmp/');

You may also see an error The configuration file now needs a secret passphrase (blowfish_secret). The blowfish secret is used by phpMyAdmin for cookie authentication.

Press CTRL + W and search for CONFIG_DIR

Change line to

define('CONFIG_DIR', '/etc/phpmyadmin/');

phpMyAdmin will now generate its own blowfish secret based on the install directory.

Save file and exit. (Press CTRL + X, press Y and then press ENTER)

Now log back in to phpMyAdmin and ensure the errors are gone.

4. Cleanup

You can now delete the tar.gz file and the empty folder.

sudo rm /usr/share/phpmyadmin/phpMyAdmin-4.8.3-all-languages.tar.gz
sudo rm -rf /usr/share/phpmyadmin/phpMyAdmin-4.8.3-all-languages

And if you’re certain your new phpMyAdmin install is working correctly you can delete the backup folder.

sudo rm -rf /usr/share/phpmyadmin.bak