PHP and MySQL/MariaDB tutorial on Ubuntu

1. Can I run MariaDB and MySQL together?
2. How connect PHP to MySQL database in Linux?
3. How do I run MariaDB on Ubuntu?
4. How does php and MySQL work together?
5. Do I need to install MySQL before MariaDB?
6. Do I need to uninstall MySQL before installing MariaDB?
7. How do I know if MySQL is PHP connected?
8. How do I run a PHP file?
9. How do I run a PHP program?
10. How do I start MariaDB command line?
11. Is MariaDB better than MySQL?
12. How do I know if MariaDB is running on Linux?

Can I run MariaDB and MySQL together?

Yes, it is. Just as two MySQL instances can coexist. MariaDB is still a drop-in replacement. By port or by different socket path, and install MariaDB to a non-standard directory.

How connect PHP to MySQL database in Linux?

In order to access your MySQL database with the PHP, please follow these steps:

1. Log into your Linux web server via Secure Shell.
2. Type the following connection string to connect to your database: <? php. $link = mysql_connect('host', 'username', 'password') or die('Could not connect: ' . mysql_error());

How do I run MariaDB on Ubuntu?

To install MariaDB on Ubuntu 18.04, follow these steps:

1. Update packages index. sudo apt update.
2. Once the packages list is updated, install MariaDB by issuing the following command: sudo apt install mariadb-server.
3. The MariaDB service will start automatically.

How does php and MySQL work together?

PHP doesn't understand SQL, but it doesn't need to: PHP just establishes a connection with the MySQL server and sends the SQL message over the connection. ... The PHP language provides functions that make communicating with MySQL extremely simple. You use PHP functions to send SQL queries to the database.

Do I need to install MySQL before MariaDB?

MariaDB was designed as a drop-in replacement of MySQL, with more features, new storage engines, fewer bugs, and better performance, but you can also install it alongside MySQL. (This can be useful, for example, if you want to migrate databases/applications one by one.)

Do I need to uninstall MySQL before installing MariaDB?

You can't have MySQL and MariaDB installed on the same server. So you need to do a complete uninstallation. You must notice that when having MariaDB installed, if you need to remove it in order to install MySQL, don't forget to remove the repo otherwise MySQL will be not able to be installed.

How do I know if MySQL is PHP connected?

It's very simple concept, first the “mysql_connect” argument will check the database hostname, username and password. If the first argument is true, then PHP take the second line to execute else the script will die with an output given in the Die section. Similarly, mysql_select_db check the database on the server.

How do I run a PHP file?

If you installed a web server in your computer, usually the root of its web folder can be accessed by typing http://localhost in the web browser. So, if you placed a file called hello. php inside its web folder, you can run that file by calling http://localhost/hello.php.

How do I run a PHP program?

A PHP code will run as a web server module or as a command-line interface. To run PHP for the web, you need to install a Web Server like Apache and you also need a database server like MySQL. There are various web servers for running PHP programs like WAMP & XAMPP.

How do I start MariaDB command line?

Windows

1. Open the command prompt by following this steps: Start -> run -> cmd -> press enter.
2. Navigate to your MariaDb installation folder (Default: C:\Program Files\MariaDb\MariaDb Server 12\bin)
3. Type in: mysql -u root -p.
4. GRANT ALL PRIVILEGES ON *. ...
5. Run this last command: FLUSH PRIVILEGES;
6. To exit type: quit.

Is MariaDB better than MySQL?

MariaDB has 12 new storage engines whereas MySQL has lesser storage engines. ... MariaDB is Open Source whereas MySQL uses some proprietary code in its Enterprise Edition. MariaDB doesn't support Data Masking and Dynamic column while MySQL supports it. Comparatively MariaDB is faster than MySQL.

How do I know if MariaDB is running on Linux?

The ps command stands for process status. This is one of the most basic commands that shows the system running processes with details. To do so, you first need to find the PID of MySQL/MariaDB using the pidof command. Once you have the MySQL/MariaDB PID, use the “etime” option with the ps command and get the uptime.