CMS frameworks such as WordPress, Joomla and Drupal, use a complex code and consume many processes. Several website speed enhancement plugins are available, heavily featured within the yield of a typical search engine recommendation. Most of them do not explain how to enable opcode caching server-side – thankfully, it’s simple to implement.

A cursory search for ways to speed up websites will yield plugins and bolt on that only address part of the requirement. The Power Users amongst us need to know how to enable functionality server-side. This short guide will cover off the basics to get you started with OPcache on Ubuntu 18.04 with PHP 7.3 but approach is more or less the same for all Ubuntu versions.

For more detailed runtime options, take a look at the php.net site which has a page of all the runtime options available.

To get OPcache set up requires some changes in the php.ini file on your server.

Open php.ini in your favourite text editor
To get started open your php.ini file. Depending on your configuration, this will be in one of two locations:

APACHE 
sudo nano /etc/php/7.3/apache2/php.ini

Or

NGINX 
sudo nano /etc/php/7.3/fpm/php.ini

Enable OPcache
To enable the OPcache, change to the following lines of your php.ini file:

;opcache.enable=0

Change to:

opcache.enable=1

Note: Remember to uncomment this line and other configuration lines (remove the “;”) as well as change the “0″ to “1″ Otherwise your change won’t take effect.

Modify the amount of RAM the OPcache will use
With OPcache, there is a trade-off between speed and the amount of RAM used. The more RAM you are willing to dedicate to storing opcode, the more opcode that can be stored. There is a diminishing return at some point, because some code will execute rarely, or your code base might not be that big. It is worth playing with this setting to see where you get the best performance-versus-RAM trade-off. This setting is in megabytes.

;opcache.memory_consumption=64

Change to:

opcache.memory_consumption=128

Boost the number of scripts that can be cached
OPcache has a strange setting that requires you to not only adjust the amount of RAM but also define the number of scripts that can be cached. You have the option of tuning this parameter for your own application too, especially if you find that your hit rate is not close to 100 percent.

;opcache.max_accelerated_files=2000

Change to:

opcache.max_accelerated_files=4000

Change the revalidate frequency
To make sure that the OPcache notices when you change your PHP code, you can set the revalidate frequency. Basically, this will tell the cache how often to check the timestamp on the files. This is measured in seconds.

;opcache_revalidate_freq = 2

Change to:

opcache_revalidate_freq = 240

Verify that the PHP OPcache mod is enabled
Believe it or not, that converts most of the settings you will need to get started. PHP7 has its own module system (since 5.4), so make sure that OPcache is enabled.

sudo phpenmod opcache

Restart PHP
You should now be all set to start using PHP 7’s OPcache. You just need to restart the appropriate service to get it going.

APACHE WEB SERVERS

sudo service apache2 restart

NGINX WEB SERVERS

sudo service nginx restart

The post How to install PHP opcache appeared first on ubuntu|dog.

1. Back up phpMyAdmin

You should back up 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 4.9.1, released Sept 2019. If a later version is now available, make sure to change the commands below to match (and let me know in the comments so I can update the guide 😉).

sudo wget https://files.phpmyadmin.net/phpMyAdmin/4.9.1/phpMyAdmin-4.9.1-all-languages.tar.gz

Now extract

sudo tar xzf phpMyAdmin-4.9.1-all-languages.tar.gz

Once extracted, list folder

ls

You should see a new folder phpMyAdmin-4.9.1-all-languages

We want to move the contents of this folder to /usr/share/phpmyadmin

sudo mv phpMyAdmin-4.9.1-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-4.9.1-all-languages.tar.gz

sudo rm -rf /usr/share/phpmyadmin/phpMyAdmin-4.9.1-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

Hurrah!

The post How to Manually Upgrade phpMyAdmin appeared first on ubuntu|dog.

I came up with an easy solution. Edit your configuration.php files both in

_zen_cart_folder/includes/configuration.php and _zen_cart_folder/admin/includes/configuration.php

Locate the row:

define(‘STORE_SESSIONS’, ”);

and change it to:

define(‘STORE_SESSIONS’, ‘db’);

Now reload both admin and frontpage.

You can now change back to

define(‘STORE_SESSIONS’, ”);

The notice about the session directory that does not exists should now be gone.

The post Zencart – sessions directory does not exist appeared first on ubuntu|dog.

apt-get install apache2 php5 libapache2-mod-php5 mysql-server libapache2-mod-auth-mysql php5-mysql phpmyadmin php5-ffmpeg php5-gd php5-curl

/Good luck! 😉

The post Nice and easy LAMP install on Ubuntu 10.04 appeared first on ubuntu|dog.

sudo apt-get install php5-ffmpeg ffmpeg flvtool2 mencoder lame

The post Packages you need to get php5-ffmpeg working appeared first on ubuntu|dog.