Nginx Get Variable From Url

What is Nginx?

Nginx is a web server that is commonly used in hosting services as well as in development projects. It was initially released in 2004 and is now one of the most widely used web servers in the world. The name is derived from the Russian word for engine, which implies speed and efficiency. Nginx is known for its reliability, high performance, and easy configuration. It is also lightweight and requires less resources than many other web servers.

Nginx is an open-source and free web server that is designed to serve static and dynamic web pages quickly and efficiently. It is also commonly used as a reverse proxy, load balancer, and cache server. Nginx can also be used as the main component of a server hosting multiple sites or services on the same box. Additionally, it is highly extensible and comes with many plugins, modules, and other tools that allow you to customize the server for almost any use case you can imagine.

How Nginx Works

Nginx works by accepting HTTP requests from clients such as browsers, and matching the request to a specific site or service. It then serves the response back to the client. Nginx is optimized for speed and performance, so it can serve requests much faster than other web servers. It is also designed to minimize latency and maximize throughput, making it a great choice for busy websites. Additionally, Nginx can be configured to serve different types of content, such as HTML, CSS, images, and videos.

Nginx is used in a variety of different web hosting environments, from small single-site setups to large-scale enterprise operations. Its flexibility and scalability make it a popular choice for web hosting services. It is also open-source, which means that anyone can extend and modify its code to suit their own needs.

How to Get Variable from URL in Nginx

Nginx is capable of parsing the query string of a URL and extracting variables from it. This is a powerful tool for web developers who want to use the GET method in a form or AJAX request without having to parse out the variables themselves. To extract the variables from the URL, you need to use the “$arg_” syntax in the Nginx configuration file.

For example, if you have a URL like this: https://www.example.com/get?name=John&phone=1234567890 you can extract the name and phone variables like this:

    location /get{

        set $name $arg_name;

        set $phone $arg_phone;

    }

This will set the $name and $phone variables to the values from the URL query string. You can then use these variables in your Nginx configuration. For example, if you want to pass the values to a PHP script, you can add them as parameters in the URL like this:

    location /get{

        set $name $arg_name;

        set $phone $arg_phone;

        proxy_pass http://127.0.0.1/script.php?name=$name&phone=$phone;

    }

How to Check Variable in Nginx

To make sure that the variable you’ve set is correct, you can use the “$echo_name” or “$echo_phone” commands in the Nginx configuration file. This will print the value of the variable in the log file, so you can confirm that the value is set correctly. This is especially useful if you’re trying to debug a problem or optimize your code.

Examples of Nginx Get Variable

Here are some examples of how to use the $arg_ syntax to extract variables from the URL query string. In each example, the URL passed to the server is “https://www.example.com/get?var1=val1&var2=val2”:

• Extract two variables and store them in $var1 and $var2:

        location /get {

            set $var1 $arg_var1;

            set $var2 $arg_var2;

        }

    

• Extract two variables and pass them to a PHP script:

        location /get {

            set $var1 $arg_var1;

            set $var2 $arg_var2;

            proxy_pass http://127.0.0.1/script.php?var1=$var1&var2=$var2;

        }

    

• Extract two variables and print their values in the Nginx log file:

        location /get {

            set $var1 $arg_var1;

            set $var2 $arg_var2;

            echo_name $var1;

            echo_name $var2;

        }

    

Conclusion

Nginx’s ability to extract and parse variables from a URL query string is a powerful tool for web developers. By using the “$arg_” syntax in the Nginx configuration file, you can quickly and easily extract variables from the URL and use them in your code or pass them to other scripts.

FAQs

Q1. What is Nginx?

A1. Nginx is a web server that is commonly used in hosting services as well as in development projects. It is an open-source and free web server that is designed to serve static and dynamic web pages quickly and efficiently.

Q2. How does Nginx work?

A2. Nginx works by accepting HTTP requests from clients such as browsers, and matching the request to a specific site or service. It then serves the response back to the client. Nginx is optimized for speed and performance, so it can serve requests much faster than other web servers.

Q3. How do you get variables from URL in Nginx?

A3. To extract the variables from the URL, you need to use the “$arg_” syntax in the Nginx configuration file. This will set the variables to the values from the URL query string, which can then be used in the Nginx configuration or passed to other scripts.

Q4. How do you check variable in Nginx?

A4. To make sure that the variable you’ve set is correct, you can use the “$echo_name” or “$echo_phone” commands in the Nginx configuration file. This will print the value of the variable in the log file, so you can confirm that the value is set correctly.

Thank you for reading this article. Be sure to check out our other articles for more information and tips.