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21.11. Communicating Between mod_perl and PHP
21.11.1. Problem
You want to build your
site from both mod_perl and PHP. For example, you might want to use
mod_perl for authentication and logging, while PHP generates the
actual content. However, doing so means that Perl and PHP must share
values; for example, so the PHP content handler knows which username
successfully authenticated through mod_perl.
21.11.2. Solution
Use Apache notes. From Perl, you simply say:$main = $r->main || $r;
$main->notes($KEY => $VALUE);
$VALUE = $main->notes($KEY);
From PHP, you say:apache_note($KEY, $VALUE);
$VALUE = apache_note($KEY);
21.11.3. Discussion
A
note is a string value attached to an Apache
request. They're a perfect way to pass information between handlers,
even when those handlers are written in different programming
languages. Each request has a different set of notes, so from Perl
always identify the main request and use it to communicate with PHP
code.Don't confuse the $r->notes method with the
$r->pnotes method. The latter is only available
to Perl modules.
21.11.4. See Also
Recipe 21.10
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| 21.10. Transparently Storing Information in URLs |  | 21.12. Migrating from CGI to mod_perl |
Copyright © 2003 O'Reilly & Associates. All rights reserved.
