What are best practices for setting permissions on directories for file uploads in PHP?

When allowing file uploads in PHP, it is important to set the correct permissions on the upload directory to ensure security and prevent unauthorized access. A common best practice is to set the directory permissions to 755, which allows the owner to read, write, and execute files, while others can only read and execute. Additionally, it is recommended to set the ownership of the directory to the web server user (e.g., www-data). 

// Set directory permissions to 755
$uploadDir = '/path/to/upload/directory';
chmod($uploadDir, 0755);

// Set ownership of the directory to the web server user
chown($uploadDir, 'www-data');

Keywords

file uploads permissions directories PHP security

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