Getting started with PHP: nginx server

As a popular programming language, PHP is widely used in website and web application development. At the same time, as an open source web server, nginx is also widely used. This article will introduce how to set up a PHP environment on the nginx server to make your web application run more efficiently and reliably.

1. Install nginx server

First, you need to install nginx server. nginx is a lightweight web server. Compared with other web servers, nginx is more stable, secure and efficient. We can install nginx through the command line. Taking the Ubuntu system as an example, the command is as follows:

sudo apt-get install nginx

With the above command, the system will automatically download and install the nginx server.

2. Install PHP

Afterwards, you need to install the PHP environment. PHP can parse and execute server-side PHP scripts and generate dynamic Web pages. We can also install the PHP environment through the command line. Taking the Ubuntu system as an example, the command is as follows:

sudo apt-get install php-fpm php-mysql

In the above command, php- fpm is a fast CGI processor, which is used to process PHP scripts; php-mysql is a PHP module for the MySQL database, which enables PHP to access and operate the MySQL database.

3. Configure the nginx server

1. Modify the nginx configuration file

You need to modify the nginx configuration file to support PHP parsing. Open the nginx configuration file, the general location is /etc/nginx/nginx.conf, and find the following code segment:

location / {
# ...
}

here Add the following content to the code snippet:

location ~ .php$ {
fastcgi_pass unix:/run/php/php7.4-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}

The meaning of this code is: when requesting a PHP file (ending with .php), use the Unix socket specified by the fastcgi_pass directive ( socket) and then pass the parameters specified by the fastcgi_param directive to the PHP script.

2. Restart the nginx server

After modifying the configuration file, you need to restart the nginx server to make it take effect. You can use the following command:

sudo systemctl restart nginx

4. Test the PHP environment

In order to test whether the PHP environment is successfully built, we can create a simple PHP script. Create an index.php file in the default root directory of nginx (/var/www/html) with the following code:

phpinfo();
?>

After saving, open the browser and visit http://localhost/index.php to see the detailed information of the PHP environment.

At the same time, we can also test whether the connection and operation between PHP and MySQL are successful by using the MySQL database in the script. The code is as follows:

$servername = "localhost";
$username = "root";
$password = "password";
$dbname = " myDB";

//Create a connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
//Check whether the connection is successful
if (!$ conn) {

die("连接失败: " . mysqli_connect_error());

}

//Create table
$sql = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR (30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";

if ( mysqli_query($conn, $sql)) {

echo "Table MyGuests created successfully";

} else {

echo "Error creating table: " . mysqli_error($conn);

}

mysqli_close($conn);
?>

If you see "Table MyGuests created successfully" in the browser, it means that the connection and operation of PHP and MySQL are successful.

5. Summary

Through the introduction of this article, we can understand the steps to build a PHP environment on the nginx server, including installing the nginx server, installing the PHP environment, modifying the nginx configuration file, and restarting nginx Server and test PHP environment, etc. I hope these basic knowledge can help you better develop and operate web applications.

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