Core Predefined Constants

These constants are defined by the PHP core. This includes PHP, the Zend engine, and SAPI modules.

PHP_VERSION ( string )

PHP_MAJOR_VERSION ( integer )

Available since PHP 5.2.7.

PHP_MINOR_VERSION ( integer )

Available since PHP 5.2.7.

PHP_RELEASE_VERSION ( integer )

Available since PHP 5.2.7.

PHP_VERSION_ID ( integer )

Available since PHP 5.2.7.

PHP_EXTRA_VERSION ( string )

Available since PHP 5.2.7.

PHP_ZTS ( integer )

Available since PHP 5.2.7.

PHP_DEBUG ( integer )

Available since PHP 5.2.7.

PHP_MAXPATHLEN ( integer )

Available since PHP 5.3.0.

PHP_OS ( string )

PHP_SAPI ( string )

Available since PHP 4.2.0. See also php_sapi_name().

PHP_EOL ( string )

Available since PHP 4.3.10 and PHP 5.0.2

PHP_INT_MAX ( integer )

Available since PHP 4.4.0 and PHP 5.0.5

PHP_INT_SIZE ( integer )

Available since PHP 4.4.0 and PHP 5.0.5

DEFAULT_INCLUDE_PATH ( string )

PEAR_INSTALL_DIR ( string )

PEAR_EXTENSION_DIR ( string )

PHP_EXTENSION_DIR ( string )

PHP_PREFIX ( string )

Available since PHP 4.3.0

PHP_BINDIR ( string )

PHP_LIBDIR ( string )

PHP_DATADIR ( string )

PHP_SYSCONFDIR ( string )

PHP_LOCALSTATEDIR ( string )

PHP_CONFIG_FILE_PATH ( string )

PHP_CONFIG_FILE_SCAN_DIR ( string )

PHP_SHLIB_SUFFIX ( string )

Available since PHP 4.3.0

PHP_OUTPUT_HANDLER_START ( integer )

PHP_OUTPUT_HANDLER_CONT ( integer )

PHP_OUTPUT_HANDLER_END ( integer )

PHP_WINDOWS_VERSION_MAJOR ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_MINOR ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_BUILD ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_PLATFORM ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_SP_MAJOR ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_SP_MINOR ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_SUITEMASK ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_VERSION_PRODUCTTYPE ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_NT_DOMAIN_CONTROLLER ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_NT_SERVER ( integer )

Available since PHP 5.3.0

PHP_WINDOWS_NT_WORKSTATION ( integer )

Available since PHP 5.3.0

E_ERROR ( integer )

E_WARNING ( integer )

E_PARSE ( integer )

E_NOTICE ( integer )

E_CORE_ERROR ( integer )

E_CORE_WARNING ( integer )

E_COMPILE_ERROR ( integer )

E_COMPILE_WARNING ( integer )

E_USER_ERROR ( integer )

E_USER_WARNING ( integer )

E_USER_NOTICE ( integer )

E_DEPRECATED ( integer )

Available since PHP 5.3.0

E_USER_DEPRECATED ( integer )

Available since PHP 5.3.0

E_ALL ( integer )

E_STRICT ( integer )

Available since PHP 5.0.0

__COMPILER_HALT_OFFSET__ ( integer )

Available since PHP 5.1.0

TRUE ( boolean )

See Booleans.

FALSE ( boolean )

See Booleans.

NULL ( boolean )

See Null.

See also: Magic constants.

Standard Predefined Constants

These constants are defined in PHP by default.

EXTR_OVERWRITE ( integer )

EXTR_SKIP ( integer )

EXTR_PREFIX_SAME ( integer )

EXTR_PREFIX_ALL ( integer )

EXTR_PREFIX_INVALID ( integer )

EXTR_PREFIX_IF_EXISTS ( integer )

EXTR_IF_EXISTS ( integer )

SORT_ASC ( integer )

SORT_DESC ( integer )

SORT_REGULAR ( integer )

SORT_NUMERIC ( integer )

SORT_STRING ( integer )

CASE_LOWER ( integer )

CASE_UPPER ( integer )

COUNT_NORMAL ( integer )

COUNT_RECURSIVE ( integer )

ASSERT_ACTIVE ( integer )

ASSERT_CALLBACK ( integer )

ASSERT_BAIL ( integer )

ASSERT_WARNING ( integer )

ASSERT_QUIET_EVAL ( integer )

CONNECTION_ABORTED ( integer )

CONNECTION_NORMAL ( integer )

CONNECTION_TIMEOUT ( integer )

INI_USER ( integer )

INI_PERDIR ( integer )

INI_SYSTEM ( integer )

INI_ALL ( integer )

M_E (float)

M_LOG2E (float)

M_LOG10E (float)

M_LN2 (float)

M_LN10 (float)

M_PI (float)

M_PI_2 (float)

M_PI_4 (float)

M_1_PI (float)

M_2_PI (float)

M_2_SQRTPI (float)

M_SQRT2 (float)

M_SQRT1_2 (float)

CRYPT_SALT_LENGTH ( integer )

CRYPT_STD_DES ( integer )

CRYPT_EXT_DES ( integer )

CRYPT_MD5 ( integer )

CRYPT_BLOWFISH ( integer )

DIRECTORY_SEPARATOR ( string )

SEEK_SET ( integer )

SEEK_CUR ( integer )

SEEK_END ( integer )

LOCK_SH ( integer )

LOCK_EX ( integer )

LOCK_UN ( integer )

LOCK_NB ( integer )

HTML_SPECIALCHARS ( integer )

HTML_ENTITIES ( integer )

ENT_COMPAT ( integer )

ENT_QUOTES ( integer )

ENT_NOQUOTES ( integer )

INFO_GENERAL ( integer )

INFO_CREDITS ( integer )

INFO_CONFIGURATION ( integer )

INFO_MODULES ( integer )

INFO_ENVIRONMENT ( integer )

INFO_VARIABLES ( integer )

INFO_LICENSE ( integer )

INFO_ALL ( integer )

CREDITS_GROUP ( integer )

CREDITS_GENERAL ( integer )

CREDITS_SAPI ( integer )

CREDITS_MODULES ( integer )

CREDITS_DOCS ( integer )

CREDITS_FULLPAGE ( integer )

CREDITS_QA ( integer )

CREDITS_ALL ( integer )

STR_PAD_LEFT ( integer )

STR_PAD_RIGHT ( integer )

STR_PAD_BOTH ( integer )

PATHINFO_DIRNAME ( integer )

PATHINFO_BASENAME ( integer )

PATHINFO_EXTENSION ( integer )

PATH_SEPARATOR ( string )

CHAR_MAX ( integer )

LC_CTYPE ( integer )

LC_NUMERIC ( integer )

LC_TIME ( integer )

LC_COLLATE ( integer )

LC_MONETARY ( integer )

LC_ALL ( integer )

LC_MESSAGES ( integer )

ABDAY_1 ( integer )

ABDAY_2 ( integer )

ABDAY_3 ( integer )

ABDAY_4 ( integer )

ABDAY_5 ( integer )

ABDAY_6 ( integer )

ABDAY_7 ( integer )

DAY_1 ( integer )

DAY_2 ( integer )

DAY_3 ( integer )

DAY_4 ( integer )

DAY_5 ( integer )

DAY_6 ( integer )

DAY_7 ( integer )

ABMON_1 ( integer )

ABMON_2 ( integer )

ABMON_3 ( integer )

ABMON_4 ( integer )

ABMON_5 ( integer )

ABMON_6 ( integer )

ABMON_7 ( integer )

ABMON_8 ( integer )

ABMON_9 ( integer )

ABMON_10 ( integer )

ABMON_11 ( integer )

ABMON_12 ( integer )

MON_1 ( integer )

MON_2 ( integer )

MON_3 ( integer )

MON_4 ( integer )

MON_5 ( integer )

MON_6 ( integer )

MON_7 ( integer )

MON_8 ( integer )

MON_9 ( integer )

MON_10 ( integer )

MON_11 ( integer )

MON_12 ( integer )

AM_STR ( integer )

PM_STR ( integer )

D_T_FMT ( integer )

D_FMT ( integer )

T_FMT ( integer )

T_FMT_AMPM ( integer )

ERA ( integer )

ERA_YEAR ( integer )

ERA_D_T_FMT ( integer )

ERA_D_FMT ( integer )

ERA_T_FMT ( integer )

ALT_DIGITS ( integer )

INT_CURR_SYMBOL ( integer )

CURRENCY_SYMBOL ( integer )

CRNCYSTR ( integer )

MON_DECIMAL_POINT ( integer )

MON_THOUSANDS_SEP ( integer )

MON_GROUPING ( integer )

POSITIVE_SIGN ( integer )

NEGATIVE_SIGN ( integer )

INT_FRAC_DIGITS ( integer )

FRAC_DIGITS ( integer )

P_CS_PRECEDES ( integer )

P_SEP_BY_SPACE ( integer )

N_CS_PRECEDES ( integer )

N_SEP_BY_SPACE ( integer )

P_SIGN_POSN ( integer )

N_SIGN_POSN ( integer )

DECIMAL_POINT ( integer )

RADIXCHAR ( integer )

THOUSANDS_SEP ( integer )

THOUSEP ( integer )

GROUPING ( integer )

YESEXPR ( integer )

NOEXPR ( integer )

YESSTR ( integer )

NOSTR ( integer )

CODESET ( integer )

LOG_EMERG ( integer )

LOG_ALERT ( integer )

LOG_CRIT ( integer )

LOG_ERR ( integer )

LOG_WARNING ( integer )

LOG_NOTICE ( integer )

LOG_INFO ( integer )

LOG_DEBUG ( integer )

LOG_KERN ( integer )

LOG_USER ( integer )

LOG_MAIL ( integer )

LOG_DAEMON ( integer )

LOG_AUTH ( integer )

LOG_SYSLOG ( integer )

LOG_LPR ( integer )

LOG_NEWS ( integer )

LOG_UUCP ( integer )

LOG_CRON ( integer )

LOG_AUTHPRIV ( integer )

LOG_LOCAL0 ( integer )

LOG_LOCAL1 ( integer )

LOG_LOCAL2 ( integer )

LOG_LOCAL3 ( integer )

LOG_LOCAL4 ( integer )

LOG_LOCAL5 ( integer )

LOG_LOCAL6 ( integer )

LOG_LOCAL7 ( integer )

LOG_PID ( integer )

LOG_CONS ( integer )

LOG_ODELAY ( integer )

LOG_NDELAY ( integer )

LOG_NOWAIT ( integer )

LOG_PERROR ( integer )