Unexpected output from php -v
<p>Just ran php -v on my Centos 5 server and got the following message back.</p>

<pre><code>Failed loading /usr/lib64/php/modules//php_ioncube_loader_lin_5.1_x86_64.so:  /usr/lib64/php/modules//php_ioncube_loader_lin_5.1_x86_64.so: undefined symbol: zend_unmangle_property_name_ex
PHP 5.2.17 (cli) (built: Jan  7 2011 10:39:29) 
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
</code></pre>

<p>PHP seems to be running okay, but I don't like the look of that message.  What does this message mean, and what should I do?  (I don't want to upgrade to 5.3 as some client sites still use deprecated in PHP 5.3 functions.) </p>
