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Re: SCRIPT_NAME [message #185648 is a reply to message #185647]

Wed, 23 April 2014 20:36

Jerry Stuckle
Messages: 2598
Registered: September 2010

Karma:

Senior Member

On 4/23/2014 3:46 PM, Christoph Michael Becker wrote:
> Jerry Stuckle wrote:
>
>> On 4/23/2014 8:21 AM, Christoph Michael Becker wrote:
>>> Thomas 'PointedEars' Lahn:
>>>
>>>> Look closely at that warning. This approach is not going to work
>>>> reliably
>>>> because the HTTP request URI does not need to have anything to do
>>>> with the
>>>> file path of the resource. In fact, there does not even need to be a
>>>> real
>>>> file for a URI, the served content could have been generated entirely
>>>> by PHP
>>>> (and usually is). As a result, in those cases filemtime() returns
>>>> FALSE …
>>>
>>> ACK.
>>>
>>>> You might be looking for filemtime(__FILE__) instead.
>>>
>>> __FILE__ contains the filepath of the currently *included* file; in Ed's
>>> case the following should be more appropriate:
>>>
>>
>> True - which in this case would be the footer, not the requested page.
>>
>>> filemtime($_SERVER['SCRIPT_NAME']);
>>>
>>
>> Unfortunately, this, too, may or may not have any relationship to the
>> file system.
>
> Indeed, you're right. Thanks for pointing that out.
>
> I was mislead by the ambiguous documentation in the PHP manual[1], which
> states:
>
> | Contains the current script's path.
>
> The CGI 1.1 specification[2] clarifies this:
>
> | The SCRIPT_NAME variable MUST be set to a URI path (not URL-encoded)
> | which could identify the CGI script
>
> [1] <http://www.php.net/manual/en/reserved.variables.server.php>
> [2] <https://tools.ietf.org/html/rfc3875#section-4.1.13>
>

There are two problems here. The first one comes when you use the
Apache rewrite option to rewrite URIs. This is commonly done with CMS's
where the actual pages are in a database, and one file handles all of
the requests (but is often used in other situations, also). In such a
case, there is no separate file.

The second problem comes in when you use the Alias (or ScriptAlias)
Apache directive to dynamically alter file paths (similar to a Linux
symlink, but on a virtual server by virtual server basis). I use the
latter regularly for images which are common to multiple websites, for
instance. So the request my refer to /images/logo.png, but the real
location is /var/www/images/logo.php (doc root would be
/var/www/sitename/html). And cgi scripts may be in /user/bin/cgi, but
the URL points to /cgi-bin.

Of course, if you don't use any of the above, the file system will
reflect the document root with the URL appended.

--
==================
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Jerry Stuckle
jstucklex(at)attglobal(dot)net
==================

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[Message index]

		404 error By: Ed Mullen on Tue, 22 April 2014 16:41
		Re: 404 error By: Jerry Stuckle on Tue, 22 April 2014 16:58
		Re: 404 error By: Ed Mullen on Tue, 22 April 2014 17:25
		Re: 404 error By: Ed Mullen on Tue, 22 April 2014 17:32
		Re: 404 error By: Jerry Stuckle on Tue, 22 April 2014 18:35
		Re: 404 error By: Lew Pitcher on Tue, 22 April 2014 18:42
		Re: 404 error By: Jerry Stuckle on Tue, 22 April 2014 18:56
		Re: 404 error By: Anders Wegge Keller on Wed, 23 April 2014 06:56
		Re: 404 error By: Thomas 'PointedEars' on Wed, 23 April 2014 11:12
		Re: 404 error By: Anders Wegge Keller on Wed, 23 April 2014 11:23
		Re: 404 error By: Thomas 'PointedEars' on Wed, 23 April 2014 11:36
		Re: 404 error By: Jerry Stuckle on Wed, 23 April 2014 12:09
		Re: 404 error By: Jerry Stuckle on Wed, 23 April 2014 12:08
		Re: 404 error By: Ed Mullen on Wed, 23 April 2014 17:12
		Re: 404 error By: Jerry Stuckle on Wed, 23 April 2014 18:50
		Re: 404 error By: Ed Mullen on Thu, 24 April 2014 00:19
		Re: 404 error By: Thomas 'PointedEars' on Tue, 22 April 2014 21:26
		Re: 404 error By: Christoph Michael Bec on Wed, 23 April 2014 12:21
		Re: 404 error By: Jerry Stuckle on Wed, 23 April 2014 13:12
		SCRIPT_NAME (was: 404 error) By: Christoph Michael Bec on Wed, 23 April 2014 19:46
		Re: SCRIPT_NAME By: Jerry Stuckle on Wed, 23 April 2014 20:36
		Re: SCRIPT_NAME By: Thomas 'PointedEars' on Wed, 23 April 2014 22:27
		Re: SCRIPT_NAME By: Christoph Michael Bec on Thu, 24 April 2014 22:35
		Re: 404 error By: Thomas 'PointedEars' on Wed, 23 April 2014 13:56
		Re: 404 error By: Christoph Michael Bec on Wed, 23 April 2014 16:00
		Re: 404 error By: Christoph Michael Bec on Wed, 23 April 2014 19:38
		Re: 404 error By: Doug Miller on Tue, 22 April 2014 22:04
		Re: 404 error By: The Natural Philosoph on Tue, 22 April 2014 23:11
		Re: 404 error By: Ed Mullen on Wed, 23 April 2014 00:22
		Re: 404 error By: Ed Mullen on Wed, 23 April 2014 16:39
		Re: 404 error By: Ed Mullen on Wed, 23 April 2014 18:22
		Re: 404 error By: Denis McMahon on Wed, 23 April 2014 21:28

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