Description:
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the php CGI binary detects the SERVER_SOFTWARE, SERVER_NAME, GATEWAY_INTERFACE, REQUEST_METHOD, and then ignores all command-line parameters.  The result is, that the below script combination prints out the entire perl script to the web server, since it reads it, and finds 0 php start/end tags.  I needed to do the below as we're working on a transition of some scripts from Perl to PHP.  As a workaround, i had to change the "system" line to "unset" all the environment variables listed above before launching the php script. 

Reproduce code:
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-- perl script:
#!/usr/bin/perl

system("/path/to/script.php");


-- /path/to/script.php:
#!/usr/bin/php4 -q

print ("hello");


Expected result:
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Expected the result to be "hi"

Actual result:
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web server prints:
#!/usr/bin/perl

system("/path/to/script.php");