(Commented with '//' means it is not implemented yet)

ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetName,               NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetFieldCount,         NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetFieldDefn,          NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetFieldIndex,         NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, AddFieldDefn,          NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetGeomType,           NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, SetGeomType,           NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, Clone,                 NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, Reference,             NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, Dereference,           NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, GetReferenceCount,     NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  PHP_ME(OGRFeatureDefn, Release,               NULL, ZEND_ACC_PUBLIC)
ogrfeaturedefn.cc:  // PHP_ME(OGRFeatureDefn, CreateFeatureDefn,
ogrfeaturedefn.cc:  // PHP_ME(OGRFeatureDefn, DestroyFeatureDefn,