"No input file specified" for some versions of PHP

  apache, fastcgi, nssm, php, windows

I have multiple versions of PHP installed as per this guide, that I wrote.
Basically, it is an ApacheLounge installation talking to PHP via FastCGI on Windows 10.
This used to let me run these PHP versions at the same time on different VirtualHosts. Apache calls the proper PHP version via FastCGI on these ports:

  • PHP 5.2.17 on port 9052
  • PHP 5.3.29 on port 9053
  • PHP 5.4.45 on port 9054
  • PHP 5.5.38 on port 9055
  • PHP 5.6.40 on port 9056
  • PHP 7.0.33 on port 9070
  • PHP 7.1.33 on port 9071
  • PHP 7.2.31 on port 9072
  • PHP 7.3.19 on port 9073
  • PHP 7.4.7 on port 9074

Everything had been working for a while after the installation. Yesterday I had to test a website on PHP 5.6, but the ouput was just a "No input file specified message" which, turns out, is not that much descriptive, as a quick google search confirmed.

So I started a systematic approach.
I created a VirtualHost for every PHP version, with just a index.php file with an echo statement.
I tested all PHP versions installed, and all PHP5 versions did not work, while PHP7 versions worked as usual.

I removed all custom configuration files. No change.

I served a simple index.html file, and that works on all VirtualHosts. About PHP, no change.

I thought it was PHP 5.x bug, but after I rebooted my PC, the PHP 5.2 version started working.
I stopped, removed and reinstalled some of the Windows Services create via NSSM, with no change.

This is what I think I know:

  • it is not a PHP 5.x issue, because PHP 5.2 works;
  • it is not a FastCGI problem, because all VirtualHosts have the same configuration, except for the port number;
  • it is not an Apache configuration problem, because it starts and stops and reboots and serves;
  • it is not a PHP configuration problem, beacuse all configuration is standard;
  • it is not a .htaccess configuration problem, because there are no .htaccess files;

Any idea about how to debug this configuration, or about what is going wrong is appreciated.

Thank you.

Source: Windows Questions

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