Posted by John Nichel on 02/20/05 20:56

Dave wrote:
> Here is some test code
> <?php
> echo "<img src=\"inline/topimage.jpg\" >";
> echo "<img src=\"/inline/topimage.jpg\" >";
> echo "<img src=\"" . $_SERVER['DOCUMENT_ROOT'] . "/inline/topimage.jpg\"
> >";
> ?>:
>
> Theoretically, they should all output the same image. However:
>
> <img src="inline/topimage.jpg" > ->IMAGE DISPLAYS
> <img src="/inline/topimage.jpg" > ->IMAGE DISPLAYS
> <img src="/home/sites/sitexxx/web/inline/topimage.jpg" > IMAGE DOES NOT
> DISPLAY

This is the expected result. $_SERVER['DOCUMENT_ROOT'] is just that.
The path from root of the _filesystem_ to where Apache's document root
is. This is not Apache's document root.

What you're looking for above is something like $_SERVER['HTTP_HOST'] or
$_SERVER['SERVER_NAME']. I'd stick with HTTP_HOST, something like this...

echo ( "<img src=\"http://" . $_SERVER['HTTP_HOST'] .
"/path/to/image.jpg\">";

> Of course, the first instance only works if the script is in the correct
> place relative to the /inline directory.
>
> However, the second case fails if I use it in the following function
> (assuming I specify $dir as "/inline"). It returns a false result, as if
> it couldn't find the directory.

This is where you would want to use DOCUMET_ROOT.

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