So what's new or tricky in eZ Publish 4.0?

eZ Publish 4 autoload generation (requires eZ Components installed)

eZ Publish 4 uses the PHP-5 autoload feature to load classes, which means that when new classes are introduced to the system, the autoload arrays need to be updated. There are several situations when a user might want to regenerate the autoload-arrays:

1. After upgrading eZ Publish, to recognise new classes in the eZ Publish kernel
2. When adding a new extension to the site, to make its classes available to eZ Publish.

Two methods of autoload regeneration are provided: a command-line version and through the Administration Interface (for example in the Setup/Extensions).

Other technical changes/issues:

• It is no longer possible to include template files from the override directory directly, and also override templates are only searched for within override directories. Details/background: http://issues.ez.no/IssueView.php?Id=9595&activeItem=25
• Code has generally been cleaned up, several constants were moved to suitable classes. This may be one of the key problems with extension's port to 4.0.
• Static class functions are now marked as static and some clean up where necessary on class functions that worked both as static and as member.
• Some methods where renamed to comply with PHP5 naming rules.

Deprecated features in eZ Publish 4

Certain features have been deprecated. These will gradually be removed in a future release, when better replacements are ready.

Deprecated datatypes:

• Enum (upgrade script available)
• Ini setting
• Subtree-subscription
• Multi-option (replaced with Multi-option2 in 3.10)
• Package

Deprecated views:

• PDF view
• PDF export
• Global settings
• kernel/form

Deprecated kernel libraries:

• ezxml
• kernel/common/ezoverride.php