The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
CRYPT_SALT_LENGTH
    (int)
   CRYPT_STD_DES
    (int)
   1.
    
   CRYPT_EXT_DES
    (int)
   1.
    
   CRYPT_MD5
    (int)
   1.
    
   CRYPT_BLOWFISH
    (int)
   1.
    
   CRYPT_SHA256
    (int)
   1.
    
   CRYPT_SHA512
    (int)
   1.
    
   HTML_SPECIALCHARS
    (int)
   HTML_ENTITIES
    (int)
   ENT_COMPAT
    (int)
   ENT_QUOTES
    (int)
   ENT_NOQUOTES
    (int)
   ENT_IGNORE
    (int)
   ENT_SUBSTITUTE
    (int)
   ENT_DISALLOWED
    (int)
   ENT_HTML401
    (int)
   ENT_XML1
    (int)
   ENT_XHTML
    (int)
   ENT_HTML5
    (int)
   CHAR_MAX
    (int)
   LC_CTYPE
    (int)
   LC_NUMERIC
    (int)
   LC_TIME
    (int)
   LC_COLLATE
    (int)
   LC_MONETARY
    (int)
   LC_ALL
    (int)
   LC_* constants affect.
    
   LC_MESSAGES
    (int)
   libintl.
    
   STR_PAD_LEFT
    (int)
   STR_PAD_RIGHT
    (int)
   STR_PAD_BOTH
    (int)
   | Constants | Description | 
|---|---|
| ABDAY_1(int) | Abbreviated name of first day of the week. | 
| ABDAY_2(int) | Abbreviated name of second day of the week. | 
| ABDAY_3(int) | Abbreviated name of third day of the week. | 
| ABDAY_4(int) | Abbreviated name of fourth day of the week. | 
| ABDAY_5(int) | Abbreviated name of fifth day of the week. | 
| ABDAY_6(int) | Abbreviated name of sixth day of the week. | 
| ABDAY_7(int) | Abbreviated name of seventh day of the week. | 
| DAY_1(int) | Name of the first day of the week. | 
| DAY_2(int) | Name of the second day of the week. | 
| DAY_3(int) | Name of the third day of the week. | 
| DAY_4(int) | Name of the fourth day of the week. | 
| DAY_5(int) | Name of the fifth day of the week. | 
| DAY_6(int) | Name of the sixth day of the week. | 
| DAY_7(int) | Name of the seventh day of the week. | 
| ABMON_1(int) | Abbreviated name of the first month of the year. | 
| ABMON_2(int) | Abbreviated name of the second month of the year. | 
| ABMON_3(int) | Abbreviated name of the third month of the year. | 
| ABMON_4(int) | Abbreviated name of the fourth month of the year. | 
| ABMON_5(int) | Abbreviated name of the fifth month of the year. | 
| ABMON_6(int) | Abbreviated name of the sixth month of the year. | 
| ABMON_7(int) | Abbreviated name of the seventh month of the year. | 
| ABMON_8(int) | Abbreviated name of the eighth month of the year. | 
| ABMON_9(int) | Abbreviated name of the ninth month of the year. | 
| ABMON_10(int) | Abbreviated name of the tenth month of the year. | 
| ABMON_11(int) | Abbreviated name of the eleventh month of the year. | 
| ABMON_12(int) | Abbreviated name of the twelfth month of the year. | 
| MON_1(int) | Name of the first month of the year. | 
| MON_2(int) | Name of the second month of the year. | 
| MON_3(int) | Name of the third month of the year. | 
| MON_4(int) | Name of the fourth month of the year. | 
| MON_5(int) | Name of the fifth month of the year. | 
| MON_6(int) | Name of the sixth month of the year. | 
| MON_7(int) | Name of the seventh month of the year. | 
| MON_8(int) | Name of the eighth month of the year. | 
| MON_9(int) | Name of the ninth month of the year. | 
| MON_10(int) | Name of the tenth month of the year. | 
| MON_11(int) | Name of the eleventh month of the year. | 
| MON_12(int) | Name of the twelfth month of the year. | 
| AM_STR(int) | String for Ante meridian. | 
| PM_STR(int) | String for Post meridian. | 
| D_T_FMT(int) | String that can be used as the format string for strftime() to represent time and date. | 
| D_FMT(int) | String that can be used as the format string for strftime() to represent date. | 
| T_FMT(int) | String that can be used as the format string for strftime() to represent time. | 
| T_FMT_AMPM(int) | String that can be used as the format string for strftime() to represent time in 12-hour format with ante/post meridian. | 
| ERA(int) | Alternate era. | 
| ERA_YEAR(int) | Year in alternate era format. | 
| ERA_D_T_FMT(int) | Date and time in alternate era format (string can be used in strftime()). | 
| ERA_D_FMT(int) | Date in alternate era format (string can be used in strftime()). | 
| ERA_T_FMT(int) | Time in alternate era format (string can be used in strftime()). | 
| ALT_DIGITS(int) | Alternative symbols for digits. | 
| Constants | Description | 
|---|---|
| INT_CURR_SYMBOL(int) | International currency symbol. | 
| CURRENCY_SYMBOL(int) | Local currency symbol. | 
| CRNCYSTR(int) | Same value as CURRENCY_SYMBOL. | 
| MON_DECIMAL_POINT(int) | Decimal point character. | 
| MON_THOUSANDS_SEP(int) | Thousands separator (groups of three digits). | 
| MON_GROUPING(int) | Like "grouping"element. | 
| POSITIVE_SIGN(int) | Sign for positive values. | 
| NEGATIVE_SIGN(int) | Sign for negative values. | 
| INT_FRAC_DIGITS(int) | International fractional digits. | 
| FRAC_DIGITS(int) | Local fractional digits. | 
| P_CS_PRECEDES(int) | Returns 1 if CURRENCY_SYMBOLprecedes a positive value. | 
| P_SEP_BY_SPACE(int) | Returns 1 if a space separates CURRENCY_SYMBOLfrom a positive value. | 
| N_CS_PRECEDES(int) | Returns 1 if CURRENCY_SYMBOLprecedes a negative value. | 
| N_SEP_BY_SPACE(int) | Returns 1 if a space separates CURRENCY_SYMBOLfrom a negative value. | 
| P_SIGN_POSN(int) | 
 
 | 
| N_SIGN_POSN(int) | 
| Constants | Description | 
|---|---|
| DECIMAL_POINT(int) | Decimal point character. | 
| RADIXCHAR(int) | Same value as DECIMAL_POINT. | 
| THOUSANDS_SEP(int) | Separator character for thousands (groups of three digits). | 
| THOUSEP(int) | Same value as THOUSANDS_SEP. | 
| GROUPING(int) | 
| Constants | Description | 
|---|---|
| YESEXPR(int) | Regex string for matching "yes"input. | 
| NOEXPR(int) | Regex string for matching "no"input. | 
| YESSTR(int) | Output string for "yes". | 
| NOSTR(int) | Output string for "no". | 
| Constants | Description | 
|---|---|
| CODESET(int) | Return a string with the name of the character encoding. | 
