# Predefined Constants

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` integer
`CRYPT_STD_DES` integer
`CRYPT_EXT_DES` integer
`CRYPT_MD5` integer
`CRYPT_BLOWFISH` integer
`HTML_SPECIALCHARS` (integer)
`HTML_ENTITIES` (integer)
`ENT_COMPAT` (integer)
`ENT_QUOTES` (integer)
`ENT_NOQUOTES` (integer)
`ENT_IGNORE` (integer)
`ENT_SUBSTITUTE` (integer)
`ENT_DISALLOWED` (integer)
`ENT_HTML401` (integer)
`ENT_XML1` (integer)
`ENT_XHTML` (integer)
`ENT_HTML5` (integer)
`CHAR_MAX` (integer)
`LC_CTYPE` (integer)
`LC_NUMERIC` (integer)
`LC_TIME` (integer)
`LC_COLLATE` (integer)
`LC_MONETARY` (integer)
`LC_ALL` (integer)
`LC_MESSAGES` (integer)
`STR_PAD_LEFT` (integer)
`STR_PAD_RIGHT` (integer)
`STR_PAD_BOTH` (integer)