Константи, описані нижче — визначені цим розширенням, тож доступні, коли розширення скомпільовано як частина PHP або динамічно підключене під час виконання.
NIL
(int)
OP_DEBUG
(int)
OP_READONLY
(int)
OP_ANONYMOUS
(int)
OP_SHORTCACHE
(int)
OP_SILENT
(int)
OP_PROTOTYPE
(int)
OP_HALFOPEN
(int)
OP_EXPUNGE
(int)
OP_SECURE
(int)
CL_EXPUNGE
(int)
FT_UID
(int)
FT_PEEK
(int)
FT_NOT
(int)
FT_INTERNAL
(int)
FT_PREFETCHTEXT
(int)
ST_UID
(int)
ST_SILENT
(int)
ST_SET
(int)
CP_UID
(int)
CP_MOVE
(int)
SE_UID
(int)
SE_FREE
(int)
SE_NOPREFETCH
(int)
SO_FREE
(int)
SO_NOSERVER
(int)
SA_MESSAGES
(int)
SA_RECENT
(int)
SA_UNSEEN
(int)
SA_UIDNEXT
(int)
SA_UIDVALIDITY
(int)
SA_ALL
(int)
LATT_NOINFERIORS
(int)
LATT_NOSELECT
(int)
LATT_MARKED
(int)
LATT_UNMARKED
(int)
LATT_REFERRAL
(int)
LATT_HASCHILDREN
(int)
LATT_HASNOCHILDREN
(int)
SORTDATE
(int)
SORTARRIVAL
(int)
SORTFROM
(int)
SORTSUBJECT
(int)
SORTTO
(int)
SORTCC
(int)
SORTSIZE
(int)
TYPETEXT
(int)
TYPEMULTIPART
(int)
TYPEMESSAGE
(int)
TYPEAPPLICATION
(int)
TYPEAUDIO
(int)
TYPEIMAGE
(int)
TYPEVIDEO
(int)
TYPEMODEL
(int)
TYPEOTHER
(int)
ENC7BIT
(int)
ENC8BIT
(int)
ENCBINARY
(int)
ENCBASE64
(int)
ENCQUOTEDPRINTABLE
(int)
ENCOTHER
(int)
IMAP_OPENTIMEOUT
(int)
IMAP_READTIMEOUT
(int)
IMAP_WRITETIMEOUT
(int)
IMAP_CLOSETIMEOUT
(int)
IMAP_GC_ELT
(int)
IMAP_GC_ENV
(int)
IMAP_GC_TEXTS
(int)