Unable to register wp_issues_crm_autoloader

Is it a PHP version issue?

* spl_autoload_register is being used and it requires PHP >= 5.1.2.
* My blog is running on PHP 5.2.17, so it should be fine.

I have confirmed it is a PHP version issue. When I upgraded to PHP Version 5.4.40, it worked.

This should be documented as a restriction of the plug-in (or perhaps even made backwardly compatible with 5.2).

thank you for identifying this issue. The plugin does require the php class autoloader. I will confirm the earliest php version that works and add appropriate documentation.

I have posted an upgrade, version 2.2.2.1, which should make the autoload issue OK back to PHP version 5.1.2 — other issues might arise for versions that old, but this issue should be eliminated. The spl_autoload_register function dates from PHP 5.1.2., but the plugin was using an additional parameter that was introduced in 5.3.0. That parameter dictated that the loader be prepended to the upload queue instead of appended. This was unnecessary and I removed it in the version 2.2.2.1 of the plugin.

My production site using this plugin runs PHP 5.3.19 and my development site runs PHP 5.5.9-1ubuntu4.9, so any PHP version in this range should be OK for the plugin. WordPress requires PHP version 5.2.4 or greater and recommendeds PHP 5.4 or greater.