学步园

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)