How to solve the error when nginx opens php

1. Check whether the Nginx server is compatible with the PHP running environment

Before proceeding to the next step, you You need to make sure that the Nginx server is compatible with your PHP running environment. You can run some test scripts to see if the Nginx server and PHP environment work together. If the test script runs normally, it means that the Nginx server is compatible with the PHP environment. Otherwise, you need to follow the next steps to solve this problem.

2. Check whether the Nginx server has been correctly configured

## Correctly configuring the Nginx server is the first step to solve the error. You need to check the Nginx server's configuration file to make sure it is parsing PHP files correctly. Here are some examples of configuration files:

location ~ \.php$ {
    fastcgi_pass   127.0.0.1:9000;
    fastcgi_index  index.php;
    fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
    include        fastcgi_params;
}

In this example, you need to make sure that the fastcgi_pass option has the correct IP address as well as the port number. You also need to make sure the fastcgi_index option points to the correct filename.

3. Check whether the PHP running environment is installed correctly

The error may also be caused by the PHP running environment not being installed correctly of. You need to check whether the PHP library is installed correctly and ensure that the PHP runtime environment is working properly. If PHP is not installed in the correct directory, you need to change the PHP path configuration in the Nginx server configuration file.

4. Check if the PHP module is installed correctly

If you are sure that the PHP library is installed correctly, it may be missing Caused by certain PHP modules. You can try entering the following command in the terminal to see if the PHP module has been installed correctly:

php -m

In this command, the -m option is used to view the installed PHP modules. If the PHP module is not installed, you need to install the missing PHP module.

5. Check whether the Nginx server has correctly parsed the PHP file

If you have checked the above steps and still cannot open it PHP file, it may be caused by the Nginx server being unable to correctly parse the PHP file. You can try to generate an error.log file in the Nginx server to determine the cause of the error. For example:

location ~ \.php$ {
    fastcgi_pass   127.0.0.1:9000;
    fastcgi_index  index.php;
    fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
    include        fastcgi_params;
    error_log      /var/log/nginx/php.error.log;
}

In this example, you need to point the error_log option to the correct path and determine whether the path is set to be writable.

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