PHP 8.3: 某些 PHP 扩展类中的类常量类型声明
作为对 PHP 8.3 中支持类常量类型的 PHP 的后续更改，Phar、SNMP 和 Phar 扩展类常量将使用常量类型进行更新。
任何扩展以下类并覆盖现有常量的用户空间 PHP 类都将导致致命错误。
扩展这些类的用户空间 PHP 类并重写常量的情况并不常见。
受影响的扩展：
- Phar 扩展中的
\Phar类 - SNMP 扩展中的
\SNMP类 - Zip 扩展中的
\ZipArchive类
Phar 扩展中类常量类型
Phar 扩展声明了一个 Phar 类，该类声明了多个类常量。在 PHP 8.3 中, Phar 类常量也使用了类型声明。
class Phar extends RecursiveDirectoryIterator implements Countable, ArrayAccess {
- const BZ2 = UNKNOWN;
+ const int BZ2 = UNKNOWN;
- const GZ = UNKNOWN;
+ const int GZ = UNKNOWN;
- const NONE = UNKNOWN;
+ const int NONE = UNKNOWN;
- const PHAR = UNKNOWN;
+ const int PHAR = UNKNOWN;
- const TAR = UNKNOWN;
+ const int TAR = UNKNOWN;
- const ZIP = UNKNOWN;
+ const int ZIP = UNKNOWN;
- const COMPRESSED = UNKNOWN;
+ const int COMPRESSED = UNKNOWN;
- const PHP = UNKNOWN;
+ const int PHP = UNKNOWN;
- const PHPS = UNKNOWN;
+ const int PHPS = UNKNOWN;
- const MD5 = UNKNOWN;
+ const int MD5 = UNKNOWN;
- const OPENSSL = UNKNOWN;
+ const int OPENSSL = UNKNOWN;
- const OPENSSL_SHA256 = UNKNOWN;
+ const int OPENSSL_SHA256 = UNKNOWN;
- const OPENSSL_SHA512 = UNKNOWN;
+ const int OPENSSL_SHA512 = UNKNOWN;
- const SHA1 = UNKNOWN;
+ const int SHA1 = UNKNOWN;
- const SHA256 = UNKNOWN;
+ const int SHA256 = UNKNOWN;
- const SHA512 = UNKNOWN;
+ const int SHA512 = UNKNOWN;
// Rest of the Phar class
}SNMP 扩展类常量类型
class SNMP {
- public const VERSION_1 = UNKNOWN;
+ public const int VERSION_1 = UNKNOWN;
- public const VERSION_2c = UNKNOWN;
+ public const int VERSION_2c = UNKNOWN;
- public const VERSION_2C = UNKNOWN;
+ public const int VERSION_2C = UNKNOWN;
- public const VERSION_3 = UNKNOWN;
+ public const int VERSION_3 = UNKNOWN;
- public const ERRNO_NOERROR = UNKNOWN;
+ public const int ERRNO_NOERROR = UNKNOWN;
- public const ERRNO_ANY = UNKNOWN;
+ public const int ERRNO_ANY = UNKNOWN;
- public const ERRNO_GENERIC = UNKNOWN;
+ public const int ERRNO_GENERIC = UNKNOWN;
- public const ERRNO_TIMEOUT = UNKNOWN;
+ public const int ERRNO_TIMEOUT = UNKNOWN;
- public const ERRNO_ERROR_IN_REPLY = UNKNOWN;
+ public const int ERRNO_ERROR_IN_REPLY = UNKNOWN;
- public const ERRNO_OID_NOT_INCREASING = UNKNOWN;
+ public const int ERRNO_OID_NOT_INCREASING = UNKNOWN;
- public const ERRNO_OID_PARSING_ERROR = UNKNOWN;
+ public const int ERRNO_OID_PARSING_ERROR = UNKNOWN;
- public const ERRNO_MULTIPLE_SET_QUERIES = UNKNOWN;
+ public const int ERRNO_MULTIPLE_SET_QUERIES = UNKNOWN;
// Rest of the SNMP class
}Zip 扩展类常量类型
Zip 扩展中的 ZipArchive 也为它类中的常量声明了类型。
class ZipArchive implements Countable {
- public const CREATE = UNKNOWN;
+ public const int CREATE = UNKNOWN;
- public const EXCL = UNKNOWN;
+ public const int EXCL = UNKNOWN;
- public const CHECKCONS = UNKNOWN;
+ public const int CHECKCONS = UNKNOWN;
- public const OVERWRITE = UNKNOWN;
+ public const int OVERWRITE = UNKNOWN;
- public const RDONLY = UNKNOWN;
+ public const int RDONLY = UNKNOWN;
- public const FL_NOCASE = UNKNOWN;
+ public const int FL_NOCASE = UNKNOWN;
- public const FL_NODIR = UNKNOWN;
+ public const int FL_NODIR = UNKNOWN;
- public const FL_COMPRESSED = UNKNOWN;
+ public const int FL_COMPRESSED = UNKNOWN;
- public const FL_UNCHANGED = UNKNOWN;
+ public const int FL_UNCHANGED = UNKNOWN;
- public const FL_RECOMPRESS = UNKNOWN;
+ public const int FL_RECOMPRESS = UNKNOWN;
- public const FL_ENCRYPTED = UNKNOWN;
+ public const int FL_ENCRYPTED = UNKNOWN;
- public const FL_OVERWRITE = UNKNOWN;
+ public const int FL_OVERWRITE = UNKNOWN;
- public const FL_LOCAL = UNKNOWN;
+ public const int FL_LOCAL = UNKNOWN;
- public const FL_CENTRAL = UNKNOWN;
+ public const int FL_CENTRAL = UNKNOWN;
- public const FL_ENC_GUESS = UNKNOWN;
+ public const int FL_ENC_GUESS = UNKNOWN;
- public const FL_ENC_RAW = UNKNOWN;
+ public const int FL_ENC_RAW = UNKNOWN;
- public const FL_ENC_STRICT = UNKNOWN;
+ public const int FL_ENC_STRICT = UNKNOWN;
- public const FL_ENC_UTF_8 = UNKNOWN;
+ public const int FL_ENC_UTF_8 = UNKNOWN;
- public const FL_ENC_CP437 = UNKNOWN;
+ public const int FL_ENC_CP437 = UNKNOWN;
- public const FL_OPEN_FILE_NOW = UNKNOWN;
+ public const int FL_OPEN_FILE_NOW = UNKNOWN;
- public const CM_DEFAULT = UNKNOWN;
+ public const int CM_DEFAULT = UNKNOWN;
- public const CM_STORE = UNKNOWN;
+ public const int CM_STORE = UNKNOWN;
- public const CM_SHRINK = UNKNOWN;
+ public const int CM_SHRINK = UNKNOWN;
- public const CM_REDUCE_1 = UNKNOWN;
+ public const int CM_REDUCE_1 = UNKNOWN;
- public const CM_REDUCE_2 = UNKNOWN;
+ public const int CM_REDUCE_2 = UNKNOWN;
- public const CM_REDUCE_3 = UNKNOWN;
+ public const int CM_REDUCE_3 = UNKNOWN;
- public const CM_REDUCE_4 = UNKNOWN;
+ public const int CM_REDUCE_4 = UNKNOWN;
- public const CM_IMPLODE = UNKNOWN;
+ public const int CM_IMPLODE = UNKNOWN;
- public const CM_DEFLATE = UNKNOWN;
+ public const int CM_DEFLATE = UNKNOWN;
- public const CM_DEFLATE64 = UNKNOWN;
+ public const int CM_DEFLATE64 = UNKNOWN;
- public const CM_PKWARE_IMPLODE = UNKNOWN;
+ public const int CM_PKWARE_IMPLODE = UNKNOWN;
- public const CM_BZIP2 = UNKNOWN;
+ public const int CM_BZIP2 = UNKNOWN;
- public const CM_LZMA = UNKNOWN;
+ public const int CM_LZMA = UNKNOWN;
- public const CM_LZMA2 = UNKNOWN;
+ public const int CM_LZMA2 = UNKNOWN;
- public const CM_ZSTD = UNKNOWN;
+ public const int CM_ZSTD = UNKNOWN;
- public const CM_XZ = UNKNOWN;
+ public const int CM_XZ = UNKNOWN;
- public const CM_TERSE = UNKNOWN;
+ public const int CM_TERSE = UNKNOWN;
- public const CM_LZ77 = UNKNOWN;
+ public const int CM_LZ77 = UNKNOWN;
- public const CM_WAVPACK = UNKNOWN;
+ public const int CM_WAVPACK = UNKNOWN;
- public const CM_PPMD = UNKNOWN;
+ public const int CM_PPMD = UNKNOWN;
- public const ER_OK = UNKNOWN;
+ public const int ER_OK = UNKNOWN;
- public const ER_MULTIDISK = UNKNOWN;
+ public const int ER_MULTIDISK = UNKNOWN;
- public const ER_RENAME = UNKNOWN;
+ public const int ER_RENAME = UNKNOWN;
- public const ER_CLOSE = UNKNOWN;
+ public const int ER_CLOSE = UNKNOWN;
- public const ER_SEEK = UNKNOWN;
+ public const int ER_SEEK = UNKNOWN;
- public const ER_READ = UNKNOWN;
+ public const int ER_READ = UNKNOWN;
- public const ER_WRITE = UNKNOWN;
+ public const int ER_WRITE = UNKNOWN;
- public const ER_CRC = UNKNOWN;
+ public const int ER_CRC = UNKNOWN;
- public const ER_ZIPCLOSED = UNKNOWN;
+ public const int ER_ZIPCLOSED = UNKNOWN;
- public const ER_NOENT = UNKNOWN;
+ public const int ER_NOENT = UNKNOWN;
- public const ER_EXISTS = UNKNOWN;
+ public const int ER_EXISTS = UNKNOWN;
- public const ER_OPEN = UNKNOWN;
+ public const int ER_OPEN = UNKNOWN;
- public const ER_TMPOPEN = UNKNOWN;
+ public const int ER_TMPOPEN = UNKNOWN;
- public const ER_ZLIB = UNKNOWN;
+ public const int ER_ZLIB = UNKNOWN;
- public const ER_MEMORY = UNKNOWN;
+ public const int ER_MEMORY = UNKNOWN;
- public const ER_CHANGED = UNKNOWN;
+ public const int ER_CHANGED = UNKNOWN;
- public const ER_COMPNOTSUPP = UNKNOWN;
+ public const int ER_COMPNOTSUPP = UNKNOWN;
- public const ER_EOF = UNKNOWN;
+ public const int ER_EOF = UNKNOWN;
- public const ER_INVAL = UNKNOWN;
+ public const int ER_INVAL = UNKNOWN;
- public const ER_NOZIP = UNKNOWN;
+ public const int ER_NOZIP = UNKNOWN;
- public const ER_INTERNAL = UNKNOWN;
+ public const int ER_INTERNAL = UNKNOWN;
- public const ER_INCONS = UNKNOWN;
+ public const int ER_INCONS = UNKNOWN;
- public const ER_REMOVE = UNKNOWN;
+ public const int ER_REMOVE = UNKNOWN;
- public const ER_DELETED = UNKNOWN;
+ public const int ER_DELETED = UNKNOWN;
- public const ER_ENCRNOTSUPP = UNKNOWN;
+ public const int ER_ENCRNOTSUPP = UNKNOWN;
- public const ER_RDONLY = UNKNOWN;
+ public const int ER_RDONLY = UNKNOWN;
- public const ER_NOPASSWD = UNKNOWN;
+ public const int ER_NOPASSWD = UNKNOWN;
- public const ER_WRONGPASSWD = UNKNOWN;
+ public const int ER_WRONGPASSWD = UNKNOWN;
- public const ER_OPNOTSUPP = UNKNOWN;
+ public const int ER_OPNOTSUPP = UNKNOWN;
- public const ER_INUSE = UNKNOWN;
+ public const int ER_INUSE = UNKNOWN;
- public const ER_TELL = UNKNOWN;
+ public const int ER_TELL = UNKNOWN;
- public const ER_COMPRESSED_DATA = UNKNOWN;
+ public const int ER_COMPRESSED_DATA = UNKNOWN;
- public const ER_CANCELLED = UNKNOWN;
+ public const int ER_CANCELLED = UNKNOWN;
- public const ER_DATA_LENGTH = UNKNOWN;
+ public const int ER_DATA_LENGTH = UNKNOWN;
- public const ER_NOT_ALLOWED = UNKNOWN;
+ public const int ER_NOT_ALLOWED = UNKNOWN;
- public const AFL_RDONLY = UNKNOWN;
+ public const int AFL_RDONLY = UNKNOWN;
- public const AFL_IS_TORRENTZIP = UNKNOWN;
+ public const int AFL_IS_TORRENTZIP = UNKNOWN;
- public const AFL_WANT_TORRENTZIP = UNKNOWN;
+ public const int AFL_WANT_TORRENTZIP = UNKNOWN;
- public const AFL_CREATE_OR_KEEP_FILE_FOR_EMPTY_ARCHIVE = UNKNOWN;
+ public const int AFL_CREATE_OR_KEEP_FILE_FOR_EMPTY_ARCHIVE = UNKNOWN;
- public const OPSYS_DOS = UNKNOWN;
+ public const int OPSYS_DOS = UNKNOWN;
- public const OPSYS_AMIGA = UNKNOWN;
+ public const int OPSYS_AMIGA = UNKNOWN;
- public const OPSYS_OPENVMS = UNKNOWN;
+ public const int OPSYS_OPENVMS = UNKNOWN;
- public const OPSYS_UNIX = UNKNOWN;
+ public const int OPSYS_UNIX = UNKNOWN;
- public const OPSYS_VM_CMS = UNKNOWN;
+ public const int OPSYS_VM_CMS = UNKNOWN;
- public const OPSYS_ATARI_ST = UNKNOWN;
+ public const int OPSYS_ATARI_ST = UNKNOWN;
- public const OPSYS_OS_2 = UNKNOWN;
+ public const int OPSYS_OS_2 = UNKNOWN;
- public const OPSYS_MACINTOSH = UNKNOWN;
+ public const int OPSYS_MACINTOSH = UNKNOWN;
- public const OPSYS_Z_SYSTEM = UNKNOWN;
+ public const int OPSYS_Z_SYSTEM = UNKNOWN;
- public const OPSYS_CPM = UNKNOWN;
+ public const int OPSYS_CPM = UNKNOWN;
- public const OPSYS_WINDOWS_NTFS = UNKNOWN;
+ public const int OPSYS_WINDOWS_NTFS = UNKNOWN;
- public const OPSYS_MVS = UNKNOWN;
+ public const int OPSYS_MVS = UNKNOWN;
- public const OPSYS_VSE = UNKNOWN;
+ public const int OPSYS_VSE = UNKNOWN;
- public const OPSYS_ACORN_RISC = UNKNOWN;
+ public const int OPSYS_ACORN_RISC = UNKNOWN;
- public const OPSYS_VFAT = UNKNOWN;
+ public const int OPSYS_VFAT = UNKNOWN;
- public const OPSYS_ALTERNATE_MVS = UNKNOWN;
+ public const int OPSYS_ALTERNATE_MVS = UNKNOWN;
- public const OPSYS_BEOS = UNKNOWN;
+ public const int OPSYS_BEOS = UNKNOWN;
- public const OPSYS_TANDEM = UNKNOWN;
+ public const int OPSYS_TANDEM = UNKNOWN;
- public const OPSYS_OS_400 = UNKNOWN;
+ public const int OPSYS_OS_400 = UNKNOWN;
- public const OPSYS_OS_X = UNKNOWN;
+ public const int OPSYS_OS_X = UNKNOWN;
- public const OPSYS_DEFAULT = UNKNOWN;
+ public const int OPSYS_DEFAULT = UNKNOWN;
- public const EM_NONE = UNKNOWN;
+ public const int EM_NONE = UNKNOWN;
- public const EM_TRAD_PKWARE = UNKNOWN;
+ public const int EM_TRAD_PKWARE = UNKNOWN;
- public const EM_AES_128 = UNKNOWN;
+ public const int EM_AES_128 = UNKNOWN;
- public const EM_AES_192 = UNKNOWN;
+ public const int EM_AES_192 = UNKNOWN;
- public const EM_AES_256 = UNKNOWN;
+ public const int EM_AES_256 = UNKNOWN;
- public const EM_UNKNOWN = UNKNOWN;
+ public const int EM_UNKNOWN = UNKNOWN;
- public const LIBZIP_VERSION = UNKNOWN;
+ public const string LIBZIP_VERSION = UNKNOWN;
- public const LENGTH_TO_END = UNKNOWN;
+ public const int LENGTH_TO_END = UNKNOWN;
- public const LENGTH_UNCHECKED = UNKNOWN;
+ public const int LENGTH_UNCHECKED = UNKNOWN;-+
// Rest of the ZipArchive class
}向后兼容性影响
这是 PHP 8.3 中引入的破坏性变更。不过，用户空间的 PHP 应用通常不会集成这些类或者重写这些常量。
不过，如果用户空间的 PHP 类中继承了这些类，并且对现有常量名进行了常量声明，新的类常量声明必须包含类型，并且必须是可兼容的。
class ParentClass {
public const string|int VALUE = 'MyValue';
}
class ChildClass extends ParentClass {
public const VALUE = 'MyValue';
}Fatal error: Type of ChildClass::VALUE must be compatible with ParentClass::VALUE of type string|int
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