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预定义常量

内核预定义常量

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 )
自 PHP 4.2.0 起可用。参见 php_sapi_name()
PHP_EOL ( string )
自 PHP 4.3.10 和 PHP 5.0.2 起可用
PHP_INT_MAX ( integer )
自 PHP 4.4.0 和 PHP 5.0.5 起可用
PHP_INT_SIZE ( integer )
自 PHP 4.4.0 和 PHP 5.0.5 起可用
DEFAULT_INCLUDE_PATH ( string )
PEAR_INSTALL_DIR ( string )
PEAR_EXTENSION_DIR ( string )
PHP_EXTENSION_DIR ( string )
PHP_PREFIX ( string )
自 PHP 4.3.0 起可用
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 )
自 PHP 4.3.0 起可用
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 )
从 PHP 5.0.0 起有效
__COMPILER_HALT_OFFSET__ ( integer )
自 PHP 5.1.0 起有效

参见魔术常量

标准预定义常量

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 )