I have seen the same problem reported repeatedly on bug tracking system: in php-cgi mode PHP_SELF is copied from PATH_INFO -> in standard cgi mode it is useless (for example bug report see http://bugs.php.net/bug.php?id=18942&edit=1)
... and all the bug reports are , mostly because of no user feedback, and the problem is so clear that user feedback is not even necessary. You can see the problem when you run a cgi script with two lines: <standard cgi script> #!/usr/bin/php <?php phpinfo() ?> </standard cgi script> - PHP_SELF variable would not contain script name. I will try to prove that current behaviour of PHP should be modified. PHP_SELF variable - what is it for? ----------------------------------- <manual> PHP_SELF The filename of the currently executing script, relative to the document root. If PHP is running as a command-line processor, this variable is not available. This variable will include path information if present (e.g. $PHP_SELF on this address: "http://example.com/test.php/foo.bar"; would be "/test.php/foo.bar") </manual> PHP_SELF is normaly used as a self-referencing URL. But it would only work in apache-mod and in specific situation when php is a cgi-wrapper. When you run standard cgi script as http://example.com/test.php/foo.bar.cgi $PHP_SELF is empty (because PATH_INFO is empty). The reason why PATH_INFO is the source for PHP_SELF in cgi mode is that (I think, I did not tested it) Windows' Apache edition uses PHP as a php wrapper. In this case php cgi api should be called php-cgiwrap api, and in this situation PATH_INFO contains script name. But normally PHP_SELF do not need to be equal to PATH_INFO. The purpose of PHP_SELF variable is just self-referencing and it should contain script URL and optional path info. Then, because current bevaviour of php is inconsistent, you have to do something: ------------------------- a) write it cleanly in the manual: '$PHP_SELF is useless in cgi "non-wrapper with php" mode, use other env. variables, e.g. $_SERVER['SCRIPT_URL'] if you use Apache' b) change php source in such a way, that manual description whould be correct If you choose a) - it would be OK to me, and many users would not be surprised at php behaviour, If you choose b) - read on: The referenced URL suggest to change cgi_main.c: <bug.php?id=18942> The code in question is in sapi/cgi/cgi_main.c : SG(request_info).request_uri = getenv("PATH_INFO"); if (!SG(request_info).request_uri) { SG(request_info).request_uri = getenv("SCRIPT_NAME"); } Should be more like : SG(request_info).request_uri = getenv("SCRIPT_NAME"); strcat(SG(request_info).request_uri, getenv("PATH_INFO")); </bug.php> but this would not work with Apache + cgiwrap-php (http://cgiwrap.sourceforge.net/ - use cvs version) because (taken from http://httpd.apache.org/docs/mod/mod_rewrite.html): <mod_rewrite page> environment variables named SCRIPT_URL and SCRIPT_URI. These contain the logical Web-view to the current resource, while the standard CGI/SSI variables SCRIPT_NAME and SCRIPT_FILENAME contain the physical System-view. SCRIPT_NAME=/sw/lib/w3s/tree/global/u/rse/.www/index.html SCRIPT_FILENAME=/u/rse/.www/index.html SCRIPT_URL=/u/rse/ SCRIPT_URI=http://en1.engelschall.com/u/rse/ </mod_rewrite> My own example for Apache + cgiwrap + standard-cgi-script-running-php : <exp alt="username and virtual server name is changed"> SCRIPT_NAME=/cgi-bin/cgiwrap/username/t/php-exp.cgi SCRIPT_FILENAME=/home/username/WWW/t/php-exp.cgi PATH_INFO=/test/ PHP_SELF=/test/ REQUEST_URI=/t/php.cgi/test/?test REDIRECT_URL=/t/php.cgi/test/ SCRIPT_URI=http://www.canonicalvirtualserver.com/t/php.cgi/test/ SCRIPT_URL=/t/php.cgi/test/ </exp> Then under Apache for self-referencing address you should use SCRIPT_URL variable. Then my proposition for changing cgi_main.c is: <change proposition no. 1> SG(request_info).request_uri = getenv("SCRIPT_URL"); if (!SG(request_info).request_uri) { SG(request_info).request_uri = getenv("PATH_INFO"); if (!SG(request_info).request_uri) { SG(request_info).request_uri = getenv("SCRIPT_NAME"); } } </change> or alternatively you can check if PATH_INFO has zero length: <change proposition no. 2> SG(request_info).request_uri = getenv("SCRIPT_URL"); if (!SG(request_info).request_uri) { SG(request_info).request_uri = getenv("PATH_INFO"); if (!SG(request_info).request_uri || (SG(request_info).request_uri)[0] == '\0') { SG(request_info).request_uri = getenv("SCRIPT_NAME"); } } </change> Best regards, -- Piotr Klaban -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php
