#49280 [Com]: Not possible to detect mysqlnd in php

From: Date: Mon, 17 Aug 2009 14:53:13 +0000
Subject: #49280 [Com]: Not possible to detect mysqlnd in php
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-141152@lists.php.net to get a copy of this message 
 ID:               49280
 Comment by:       ar at ez dot no
 Reported By:      ar at ez dot no
 Status:           Feedback
 Bug Type:         MySQLi related
 Operating System: *
 PHP Version:      5.3.0
 New Comment:

Hi jani!

I'm not trying to workaround anything, its just that Persistent
Connections are only supported on mysqli when mysqlnd is used.

So it doesn't help to detect php version using PHP_VERSION, as the end
user might have mysqlnd disabled / not compiled in.

It is possible to detect it by by using function_exists. But since you
guys might add those extra mysqlnd functions to the other mysql driver
as well, that is not reliable not to mention clean.
see: http://no.php.net/mysqli.mysqlnd

For what I'm trying to do:
eZ Publish like other php projects abstracts things, one of those is
Persistent connection, witch is abstracted into a ini setting
(changeable in admin gui). So I need to prepend "p:" IF user has
mysqlnd, or trow a warning about unsupported setting.


Previous Comments:
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[2009-08-17 14:30:15] jani@php.net

So you want to circumvent a bug by adding a constant instead of fixing
the actual bug? Can you please explain WHAT does not work like it should
when you have enabled mysqlnd..?

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[2009-08-17 14:21:35] ar at ez dot no

Seems to be possible with something like this as well:

strpos( mysqli_get_client_info(), 'mysqlnd ' ) !== false

But constant would still be a bit cleaner.

------------------------------------------------------------------------

[2009-08-17 14:10:00] ar at ez dot no

Description:
------------
There doesn't seem to be possible to cleanly* detect that mysqlnd is
currently in use.


* Constant would be nice, preferably already in 5.3.next
Detecting by presence off 'mysqli_fetch_all' or other functions is not
exactly clean.

Use case: Disabling / enabling Persistent Connections based on
application specific settings.
See: http://issues.ez.no/IssueView.php?Id=15315



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