Ядро PHP:
__DIR__
__NAMESPACE__
E_DEPRECATED
E_USER_DEPRECATED
INI_SCANNER_NORMAL
INI_SCANNER_RAW
PHP_MAXPATHLEN
PHP_WINDOWS_NT_DOMAIN_CONTROLLER
PHP_WINDOWS_NT_SERVER
PHP_WINDOWS_NT_WORKSTATION
PHP_WINDOWS_VERSION_BUILD
PHP_WINDOWS_VERSION_MAJOR
PHP_WINDOWS_VERSION_MINOR
PHP_WINDOWS_VERSION_PLATFORM
PHP_WINDOWS_VERSION_PRODUCTTYPE
PHP_WINDOWS_VERSION_SP_MAJOR
PHP_WINDOWS_VERSION_SP_MINOR
PHP_WINDOWS_VERSION_SUITEMASK
cURL:
CURLOPT_PROGRESSFUNCTION
GD:
IMG_FILTER_PIXELATE
JSON:
JSON_ERROR_CTRL_CHAR
JSON_ERROR_DEPTH
JSON_ERROR_NONE
JSON_ERROR_STATE_MISMATCH
JSON_ERROR_SYNTAX
JSON_FORCE_OBJECT
JSON_HEX_TAG
JSON_HEX_AMP
JSON_HEX_APOS
JSON_HEX_QUOT
LDAP:
LDAP_OPT_NETWORK_TIMEOUT
LIBXML_LOADED_VERSION
PCRE:
PREG_BAD_UTF8_OFFSET_ERROR
BUS_ADRALN
BUS_ADRERR
BUS_OBJERR
CLD_CONTIUNED
CLD_DUMPED
CLD_EXITED
CLD_KILLED
CLD_STOPPED
CLD_TRAPPED
FPE_FLTDIV
FPE_FLTINV
FPE_FLTOVF
FPE_FLTRES
FPE_FLTSUB
FPE_FLTUND
FPE_INTDIV
FPE_INTOVF
ILL_BADSTK
ILL_COPROC
ILL_ILLADR
ILL_ILLOPC
ILL_ILLOPN
ILL_ILLTRP
ILL_PRVOPC
ILL_PRVREG
POLL_ERR
POLL_HUP
POLL_IN
POLL_MSG
POLL_OUT
POLL_PRI
SEGV_ACCERR
SEGV_MAPERR
SI_ASYNCIO
SI_KERNEL
SI_MESGQ
SI_NOINFO
SI_QUEUE
SI_SIGIO
SI_TIMER
SI_TKILL
SI_USER
SIG_BLOCK
SIG_SETMASK
SIG_UNBLOCK
TRAP_BRKPT
TRAP_TRACE