PHP Manual
Appendices
Migrating from PHP 5.5.x to PHP 5.6.x
What has changed in PHP 5.6.x
Backward Incompatible Changes
New features
Deprecated features in PHP 5.6.x
Changed Functions
New Functions
Other changes to extensions
New Global Constants
Other changes to extensions
Migrating from PHP 5.4.x to PHP 5.5.x
Migrating from PHP 5.5.x to PHP 5.6.x
PHP Manual
New Global Constants
LDAP
LDAP_ESCAPE_DN
LDAP_ESCAPE_FILTER