My server is running PHP 5.3 and my WordPress install is spitting these errors out on me, causing my session_start() to break.
Deprecated: Assigning the re
In file wp-config.php you can find constant WP_DEBUG. Make sure it is set to false.
define('WP_DEBUG', false);
This is for WordPress 3.x.
I tend to use this method
$errorlevel=error_reporting();
$errorlevel=error_reporting($errorlevel & ~E_DEPRECATED);
In this way I do not turn off accidentally something I need
I needed to adapt this to
error_reporting = E_ALL & ~E_DEPRECATED