When running PHP on a virtual host, you need to pay attention to the following key points: 1. Upload PHP files to the correct directory, such as public_html or htdocs, and ensure that the file permissions are 644; 2. Check and select the appropriate PHP version to avoid version incompatibility issues; 3. If you use the database, you need to create a database and user in the control panel and modify the program configuration file to fill in the database information; 4. Pay attention to common problems, such as file path errors, disabled PHP functions, permission issues, and pseudo-static settings, etc., and enable error prompts if necessary to troubleshoot problems. As long as these steps are configured correctly, the PHP program will run smoothly.

It is actually not difficult to run PHP on a virtual host, but you have to pay attention to a few key points. Most virtual hosts support PHP, but how to operate depends on the host provider and control panel you use. Here are some common practices and precautions to help you successfully run the PHP program.

Upload PHP files to the correct directory

Generally speaking, the virtual host will have a website root directory, such as public_html or htdocs . You need to upload the PHP file you wrote to this directory, or its subdirectory.

• Use FTP or SFTP to log in to the host and upload the .php file
• Ensure reasonable file permissions (usually recommended 644)
• If you have a control panel (such as cPanel, Plesk), you can upload it directly through the file manager

If you upload an index.php to the root directory, it will be automatically loaded when accessing your domain name.

Check if the PHP version is suitable

Different virtual hosts may have different PHP versions pre-installed, and some also allow you to switch versions by yourself. If your program has requirements for PHP version, this step cannot be skipped.

• Log in to the control panel and find "PHP Settings" or similar options
• View the currently running PHP version
• If needed, you can choose a higher or lower version (such as from 7.4 to 8.1)

Some old projects rely on old version functions, and new versions may be incompatible; new projects may require higher version features, so be sure to confirm them clearly.

Configure the database (if MySQL/PostgreSQL is used)

Many PHP programs require database use, such as WordPress and Discuz. At this time, you have to create databases and users in the virtual host first.

• Create a database in Control Panel
• Create a database user and grant permissions to the user
• Modify the program's configuration file (such as config.php ) and fill in the database name, user name and password

For example: When you install WordPress, you will be prompted to fill in the database information, and these must be prepared in advance in the control panel.

Notes and FAQs

Sometimes things that seem simple can go wrong. Here are some small details that are easy to ignore:

• The file path is written incorrectly, resulting in 404 or blank page
• PHP functions are disabled (for example, some hosts will close exec() for security purposes)
• The permission setting is incorrect, and the "Permission denied" error appears
• Pseudostatic is not enabled (affecting URL rewriting function)

When you encounter problems, you can view the server log or try to open the PHP error message (adding an ini_set('display_errors', 1); error_reporting(E_ALL); in the development environment can help troubleshoot problems).

Basically that's it. As long as the files are placed in the right location and the environment is configured, most PHP programs can run normally on the virtual host.

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