这些常量在 PHP 的内核中定义。它包含 PHP、Zend 引擎和 SAPI 模块。
PHP_VERSION
(string)
PHP_OS
(string)
PHP_SAPI
(string)
PHP_EOL
(string)
PHP_INT_MAX
(integer)
PHP_INT_SIZE
(integer)
DEFAULT_INCLUDE_PATH
(string)
PEAR_INSTALL_DIR
(string)
PEAR_EXTENSION_DIR
(string)
PHP_EXTENSION_DIR
(string)
PHP_PREFIX
(string)
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)
PHP_OUTPUT_HANDLER_START
(integer)
PHP_OUTPUT_HANDLER_CONT
(integer)
PHP_OUTPUT_HANDLER_END
(integer)
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_ALL
(integer)
E_STRICT
(integer)
__COMPILER_HALT_OFFSET__
(integer)
参见魔术常量。
这些常量是 PHP 默认定义的。
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)