使用PHP7.1的Laravel项目出现Nginx 'No input file specified.'错误求助

Looking at your error log, the key line pointing to the root issue is:

PHP message: PHP Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0 Unable to open primary script: /var/www/public/index.php (Operation not permitted)

Even though your index.php has wide-open 777 permissions, PHP-FPM is being blocked from accessing it. Let's work through the most common fixes step by step:

1. Check SELinux (Most Likely Hidden Culprit) #

SELinux is often the silent blocker here—it enforces access controls separate from Unix file permissions.

• First, check if SELinux is active in enforcing mode:

  sestatus
  

  If the output shows Current mode: enforcing, it's restricting PHP-FPM's access to your files.

• To test if this is the issue, temporarily disable SELinux (don't leave this off long-term):

  setenforce 0
  

  If your site loads after this, set the correct SELinux context for your web directory to fix it permanently:

  # Allow web processes to read your Laravel files
  chcon -R -t httpd_sys_content_t /var/www/
  # Allow write access to Laravel's required directories
  chcon -R -t httpd_sys_rw_content_t /var/www/storage /var/www/bootstrap/cache
  

2. Verify PHP-FPM User Permissions #

PHP-FPM runs as a specific user (usually www-data, nginx, or php-fpm), and this user needs proper access to your /var/www directory.

• Find your PHP-FPM user/group:
  Open your PHP-FPM pool config (typically at /etc/php/7.1/fpm/pool.d/www.conf) and look for these lines:

  user = www-data
  group = www-data
  

• Ensure this user owns your Laravel directory or has read access:

  chown -R www-data:www-data /var/www
  chmod -R 755 /var/www
  

  (Note: The storage and bootstrap/cache directories need write access, so update those if needed: chmod -R 775 /var/www/storage /var/www/bootstrap/cache)

3. Validate & Refresh Nginx/PHP-FPM Configs #

Your Nginx config looks correct, but let's confirm and apply any changes:

• Test the Nginx config for syntax errors:

  nginx -t
  

• Restart both services to apply permission/context updates:

  systemctl restart nginx
  systemctl restart php7.1-fpm
  

4. Check for Other Security Tools #

If you're on a system with AppArmor or similar filesystem security tools, they might also block access. Check AppArmor's status with:

aa-status

If your PHP-FPM profile is restricting access to /var/www, you'll need to update the profile to allow it.

内容的提问来源于stack exchange，提问作者unknown