migration54.changes What has changed in PHP 5.4.x migration54.incompatible Backward Incompatible Changes migration54.new-features New features migration54.sapi Changes in SAPI modules migration54.deprecated Deprecated features in PHP 5.4.x migration54.parameters Changed Functions migration54.functions New Functions migration54.classes New Classes and Interfaces migration54.methods New Methods migration54.removed-extensions Removed Extensions migration54.extensions-other Other changes to extensions migration54.global-constants New Global Constants migration54.ini Changes to INI file handling migration54.other Other changes