Wordpress Blank Woes after Upgrading PHP 4 to 5

I have recently upgraded my system to PHP 4 and 5, and after upgrading several Drupal and Joomla websites only experienced once/twice blank pages and soon become good again. However, Wordpress kept on giving me blanks.

After some googling, I traced to 2 causes:

1. I traced the program steps and found the problem to be in wp-includes/taxonomy.php file, the following line is causing this:

$wp_taxonomies['link_category'] = (object) array('name' => 'link_category', 'object_type' => 'link', 'hierarchical' => false);

 

The author here suggested to put a new function to transform object manually, which solved his problem. However, after some more googling, solution #2 popped out.

2. The author here found that it’s the problem with PHP 5 setting zend.ze1_compatibility_mode, if one turns this off or put an off flag in .htaccess, the problem is supposed to be solved.

Now, #2 worked great and I think that’s the right root cause here without having to hack the Wordpress files