Take you step by step to solve the problem that nginx cannot find index.php

Nginx is a high-performance web server and reverse proxy server, widely used in the Internet industry. However, when using Nginx, you may encounter the problem of not being able to find the index.php file. This may cause your website to be inaccessible, thereby affecting the company's business and the user experience of the website. This article will discuss the step-by-step solution to the problem that nginx cannot find index.php.

1. Check the file path

When nginx cannot find the index.php file, first check whether the file path is correct. In the nginx configuration file, you need to configure the root directory, which is the site root directory. If the site root directory is not configured correctly, nginx will not be able to find the index.php file. Therefore, you first need to determine whether the site root directory is configured correctly.

The method is as follows:

1. Open the nginx configuration file and find the server block;
2. Find the command root in the server block;
3. Confirm the root command Is the directory pointed to correct?

For example, if our site root directory is in the /var/www/html directory, then the nginx configuration file should have the following configuration:

server {
    listen       80;
    server_name  xxx.com;
    root         /var/www/html;
    index        index.php index.html index.htm;
}

After this location is configured correctly, if If you still cannot access the index.php file, you need to search further.

2. Check Nginx’s PHP parser configuration

Check whether Nginx’s PHP parser configuration is set correctly. You can find a line statement similar to the following in the Nginx configuration file:

location ~ \.php$ {
  try_files $uri =404;
  fastcgi_split_path_info ^(.+\.php)(/.+)$;
  fastcgi_pass localhost:9000;
  fastcgi_index index.php;
  include fastcgi_params;
}

If the statement is not configured correctly, then Nginx cannot correctly find the index.php file.

The specific configuration steps are as follows:

1. Check whether the following instructions are set correctly:

root         /var/www/html;
index        index.php index.html index.htm;

2. Find the PHP parser configuration of Nginx:

location ~ \.php$ {
  try_files $uri =404;
  fastcgi_split_path_info ^(.+\.php)(/.+)$;
  fastcgi_pass localhost:9000;
  fastcgi_index index.php;
  include fastcgi_params;
}

Among them, fastcgi_pass is the address and port number of the specified PHP interpreter, and fastcgi_index is the file name that is searched by default when accessing PHP files. For example, the above configuration is to find the index.php file.

3. Check the PHP-FPM configuration

In addition to the nginx configuration file, you also need to check the PHP-FPM configuration file. If the PHP interpreter cannot interpret the PHP file, Nginx will not find the index.php file.

The specific configuration steps are as follows:

1. Open the PHP-FPM configuration file:

sudo vi /usr/local/etc/php-fpm.conf

2. Confirm the following instructions in the PHP-FPM configuration file Whether the settings are correct:

pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 2
pm.max_spare_servers = 8

The above instructions are all performance tuning instructions for PHP-FPM. You can also improve the performance of PHP-FPM by appropriately modifying these instructions.

4. PHP installation issues

If the nginx configuration file, Nginx PHP parser configuration, and PHP-FPM configuration are all correct, but the index.php file still cannot be found, then it is only possible It's because PHP was not installed successfully.

You can execute the following command to check whether PHP is installed successfully:

php -v

If PHP is not installed successfully, you can follow the following steps to install it:

1. Installation PHP:

sudo apt-get update
sudo apt-get install php-fpm

2. Set the PHP-FPM running user as www-data:

sudo vim /usr/local/etc/php-fpm.d/www.conf

Find the user and group items and modify them to www-data .

3. Restart the PHP-FPM service:

sudo systemctl restart php-fpm

After completing the above steps, check the nginx configuration file, Nginx PHP parser configuration, and PHP-FPM configuration to confirm that all If the parameters are set correctly, the problem of not being able to find the index.php file should no longer occur.

Summary

When using Nginx, the problem of not being able to find the index.php file may have a certain impact on your business. However, this problem can be solved quickly by just checking the above steps. Of course, we can also configure Nginx's url routing so that Nginx can handle url requests more flexibly and improve the performance and availability of web applications.

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